Amp for Proac Studio 140 mk2?


Hello,

My current set up consists of the following components:

Wadia 121 DAC -> Anthem MCA-20 -> ProAc Studio 140 Mk2

I am looking to upgrade the amplifier with either an Integrated or a power amp (Wadia recommends that the 121 hooks directly into a power amp).

I am considering used equipment (and assuming that I can resell and swap if the sound isn't what I am looking for) and have a budget of $3000 to $3500. I am looking for something that will pair well with the Proacs and leave a bit of room for growth down the road.

Due to kids, pets, etc, I am leaning towards solid state, but I haven't ruled out tubes.

I have considered:
Ayre V5Xe
McIntosh MC252
BAT VK-255SE (pushing the budget)
Simaudio W-5
Krell S-300i

Any thoughts or suggestions much appreciated!

Thanks!
jdstrawn
With the efficiency of the 140 mk2 you have the option of considering a class A intergrated, the Sugden A21 is a possibility. If you want or need more power consider a used Rowland Concentra 2. Of the amps you mentioned I would only consider the BAT but I would prefer the intergrated VK-300x due to the convenience of 1 box and 1 less pc/ic.
Any opinions on Pass Labs XA 30.5 (class a) or Audio Research VSI-60 (tube) with my system?

Also now considering VK-300x.

Thanks for the input!
I drive my 140's with a tube Cayin 100, and VAS tube monoblocks. Great sound, great value. Both provide better sound then solid state class a Marantz mono blocks, which I still have to drive ProAc 1SC's.