a dilemma for cartridge/phono stage combination

Apparently, your major responder, Robjerman, is under the impression that your current phono section is a type built for "high output" cartridges, most typically a moving magnet type.  However, if I read your own posts correctly, you did have enough gain for your high output MC Benz cartridge that is now broken.  Such "high output moving coil" cartridges typically put out 1-2mV, whereas a typical MM cartridge is more like 4-5mV in output.  Probably the reason your Monster cartridge sounds dull and lifeless is because the gain of your phono stage is not sufficient to bring it to life.  Do you find that your volume control is near to its wide open position, when you listen to the Monster?  If so, then you do lack the gain necessary for a low output MC.  In which case, you need either a SUT or a new phono stage with higher gain, or both if you also want an improvement in overall SQ.  A "Step-UP Transformer" or SUT is a transformer that increases the signal voltage output of a low output cartridge, to make it suitable for driving a low gain phono stage such as yours.  The SUT adds no real "gain" per se, but it converts current to voltage; most low output MC cartridges make a decent amount of current but only very low signal voltage.  Your MM phono stage is voltage-driven, so it benefits from the SUT placed in between the output of the tonearm and the input of the phono stage.  There is more to it, if you want to know more.

@lewm nice clear explanation.
@stone1 read that slowly 5 times, there is a lot of important information in that post.

The model & specs for the phono section built into your integrated would be very helpful(e.g. phono stage gain, line stage gain, loading-maybe 47k ?, capacitance). Until you figure out what would properly feed the phono stage you already own, you would be foolish to simply take @roberjerman 's suggestions and just buy what he likes. However, if you clarify the options to use:
SUT into your phono input
SUT + other phono stage into a line level input
Other phono stage (with X amount of gain) alone into a line level input
then your are in a much better position to decide which cartridge will be a good match.
Perhaps then the specific items suggested or alternatives best be considered; I'm not disagreeing with @roberjoberman's choices, just saying to figure out what you need then choose it. Don't just buy to try without understanding which paths could make sense for your long term plan and budget. 
BTW, no everyone agrees that SUTs are best idea vs. higher gain active phono stages. That's a highly debated whole 'nother conversation.
FWIW, if you do decide to pursue a separate phono stage, a used Benz Lukashek was recently listed. Might be some synergy there to go with a Benz cartridge...just a thought, I don't have a strong opinion on that item. Cheers,
Spencer

thanks again everyone for trying to help, since i’m a bit lost here.
to emphasize that, i purchased recently , after reading very good reviews, a Pickering XSV 3000 /Stylus D3001E , and was very disappointed from the result.
right now i’m working with an old MM audio technica cartridge i had at home (at11e) . the gain is o.k and sounding reasonable, but i’m not planning to stay with it.
the benz micro i had was 2.0 mv.
i’ll try as much as i know to bring relevant info about my amps.
i have right now two integrated amps.
one is the creek audio 4240 that come originally with line output only, but there was an option to fit a phono MM or MC pcb to replace the aux line level, and i did it.
i think it was kind of a printed card, or something like it.
i don’t know if it was MM or MC , think MM but not sure.
the original amp inputs are " in the reagion of 350 mv’s".
that’s all i know.
the second one, and the one i’m using now since i preferred it a bit in my current circumstances, is a vintage Pioneer SX-880 receiver.
"Input sensitivity: 2.5mV (MM), 150mV (line)".
that all i know about it.
i suppose that some time in the future i’ll buy a better amp.
maybe tube or highbreed, but right now this is my system.

lewm - you are totally right about my situation with the alpha 2.
i have to raise the amp gain almost to maximum and it still not enough .


sbank - unfortunately i don't have any info about the  loading and  capacitance .

If you like your phono preamp rather than replace it I would get a Step Up Transformer (SUT) **if** you decide on a low output cartridge.

The SUT will have to be properly loaded (which is usually a resistor-capacitor combination) depending on the cartridge. Some of the very best SUTs are made by Jensen Transformers. They have loading information for a large variety of cartridges.
The Hana is a very good recommendation BTW.