stewart0722,
Thanks for your clarification. I agree with everything you stated in your last post, especially that flea watt tube amps should be avoided. But I don't think you or I consider the VAC Avatar to be a flea watt amp at 60 watts and with a solid power supply.
natureboy,
I think members could better assist you if you declared a budget for your potential new amplification purchase.. As you know, there are a wide range of amp options for driving Magnepans.
Through stewart's personal experience, he can attest that either the Bryston 28s or 7s will likely drive your 2.5 speakers very well since they work so well on his 3.7s. I have no reason to doubt that either amp would be a good choice for the 2.5s.
Through my own and several other posters' personal experiences on this thread, we can attest that high powered class D amps (Wyred, Bel Canto and D-Sonic) will also likely drive your speakers well since they drive our Magnepans so well. I tend to think all these amps (including both Brystons) will drive the 2.5s well and that you will need to decide between them based on personal auditions and your budget.
What you don't know at this point, however, is how well your current VAC Avatar integrated will drive your Magnepan 2.5s. I think the best approach would be to thoroughly test out your VAC on the 2.5s prior to considering any changes. When I state 'thoroughly test out' I mean not only that it sounds good to you but also that it drives them effortlessly at your normal listening levels and that there is sufficient detail, 3-D sound staging and headroom in your opinion.
If you're not totally satisfied with the VAC's performance, then at least you have some very good suggestions for possible alternatives.
Tim