upgrade suggestion please for Zu Omen def


Although I am quite happy with my system, the upgrade bug bites me again. My current system has the following:

Computer
Audiogd NFB-3 DAC
PrimaLuna Prologue 3
Cary SE-1 power amp with 2A3 tube
Zu Omen Def speakers

Based on the reviews and comments, I am looking into the following options (and I didn't heard any of them)

1) replace Cary SE-1 to Melody I2A3
2) replace PrimaLuna and Cary with Almarro 318B
3) replace PrimaLuna with Supertek preamp

I think all the Melody I2A3, Almarro 318B and Supertek all with excellent feedback. The Melody I2A3 has rave review and match very well with Zu per the 6moon review. The Supertek has rave review by the community. The Almarro has rave review in 6moons as well.

Is there anyone has experience with any of them with Zu Omen Def can comment? I like to listen to female vocal, guitar, violin and saxophone. To keep the discussion focus, please limit to the options above.

Thanks in advance
gte357s
I got my brain all haywire.....the last line should be Decware Mini Torii or Torii! If budget allows, the Coincident Frankenstein is the best I have tried (disclaimer I am selling mine because I upgraded to a newer more shiney version).
Thanks for all the reply, I think I will get either the Melody and Almarro whatever come up first. The challenge is, they are very hard to cross by, and I missed a couple Almarro in the past. They are gone too quickly ...
The MasterSound Due Venti is better than the Almarro. They pop up from time to time.
To be fair to my friend, the I2A3 is a very good amp. The build quality and looks are top notch. It is a great sounding amp also. The difference was mostly in the bass area. The A318B is hard to beat in bass for a S.E.T..
Also, he listens at low level volumes at night while his family is sleeping. The volume attenuator was not sensitive enough for his listening style. The A318B has a linear volume that is much more sensitive to low volume listening. He no longer has the I2A3 amp. He went with a Ayon amp with remote control that is suited to his listening style. The Ayon amp is a very nice amp, but more money also.
Another great upgrade option is on the speakers themselves. I have had both the standard Omen Defs, and a pair with HO Drivers and upgraded Mundorf Silver in Oil Caps. Both of these made a huge improvement in the sound and took a very good speaker and made it great for me. Just my $.02.