Amp suggestionsfor Wilson Watt Puppies/Sophia

The Sophia is a lot easier to choose an amplifier. VTL Stereo 150 with a VTL 5.5 preamp is an amazing combination with Sophia's. Throw in some Transparent Super MM cabling and you have a winner.

For the WP's you need to be more critical of system synergy and spend more on an amplifier...

What components does he already own and how much does he want to spend?

check out the new VTL 450 amps with a VTL 6.5 pre. they'll do a super job driving either the sophias or watt puppies.

and go for the TA ultra SC ad ICs or you will be selling the speakers short of the extremes ,most especially the response at the lower end. from what i have heard from others, the sophia2 outperform the w/p 6s in finesse and overall coherence and do present distinctly differently from the w/p 7s. they may also be a better overal speaker than the 7s, but the sophia 2s do not have the bass of the w/p 7s. you dont mention which w/p # is being considered.
pass labs x350.5 stereo amp mates well with wilsons and the vtl 6.5 pre.