Any advise to improve my system

Change your speakers for stators. They are just perfect for the kind of music you prefer.

I also agree with the other posts; your speakers are definately your weakest link. The ironic thing about this, is how well you've managed to assemble a world class system otherwise.

I strongly feel that you have two other areas to address, which will improve your system also (but not nearly as much as the speaker change). The MIT cables are not an accurate cable (by design), they are meant to have their "own sound". If you have a system that needs their type colorations, or "equalizer with a wire", then these cables can assist your systems' performance very positively. Unfortuntely, I don't think you system needs the MIT's coloration change, to make it perform correctly.

(Note: the Nordost SPM modification, as recomended by one of the other posters, is also deigned to sound a certain way, presenting certain positive colorations. They can sound spectacular in a system that needs their type of colorations, but they are NOT neutral.

My suggeted wire choice would be Analysis Plus cables. They are the direct opposite in their sonic charactaristics of what the MIT are. They are very, very accurate, and have almost any colorations whatsoever.

My final recommendation is to have your cd player modified by someone like Stan Warren. The Sony does not use high end output devices, and also can benefit from some power supply tweaks.

(Note: Ever wondered what the major electrical differences is between the high end digital makers Theta, Levinson, Krell, from Japanese companies like Sony and Pioneer Elite. The "high end" companies always have much better output devices for their gain stages(i.e. dictrete, no I/C's), and more rigurous power supplies, with much better capacitors. If Sony and other Japanese cd player manufacturers recognized these difference, and then implemented the above changes, I'm not sure that ANY of the high end player companies could stay in business, charging the premium they do, for what could be a very small sonic difference.

Maybe one day Sony or another Japanese company will get a clue, and implement the above aformentioned modifications to their designs (the cost difference, in mass quantities for these kind of upgrades would be less than $40 per unit!)

Try a BMI power cord on your amp, then another one on the upstream stuff (You'll like them, I promise.) And they're really cheap. I had 2 master couplers, and was able to get BMI Eel Reference Customs PC's for less than what I sold the Master Couplers for.

Bass is MUCH better.

I think the most cost effective and prudent thing to do would be to try and maximize what you have first. Either by speaker placement or making sure your isolation system is good. I would approach this much like trouble shooting a computer. If you succeed in improving your sound through this manner, you will have spent less money. If it still isn't quite there, at least you will have eliminated some important variables and can then move on to other possibilities.

I agree with many people here that the Stratus Silvers may not be up to par with your electronics. Vandersteen and Meadowlark are very good suggestions. I would also look into ProAc. Detailed without being harsh. And a gigantic soundstage as a bonus.

I have not experimented with different power cables, but I have some experience with copper versus silver speaker cables and interconnects. Maybe a pair of Analysis Plus Silver Ovals will help extend both ends, and add some detail.

But again before spending a lot of money, I would tie up any existing loose ends first. Good luck and have fun!

Pops & G13 have both expressed my sentiment regarding the SR Master Couplers. Despite other improvements, I experienced considerable thinning of the bass region with those particular AC cords when I tried them. I also have one SR Reference AC which works much better as an all-around cord. Right now it's on the CD player, but it might be found connected to any of various components, or none at all, depending upon my setup. Their next better cords (the Resolution Reference AC, & Designers Reference AC) did not do so well for me but again that is all system-dependent. However their best cord, the Designers Reference Squared AC, sounded so good that I had to buy another one.