Need advice SET amp for Gibbon Super 8

To those of you with SET experience (I have none): If you had say, up to $3500 for a new or used SET amp to drive a Devore Gibbon Super 8 (88 or 89db, flat 8 ohms, said to be easy to drive)what would be your preference? Is 10-12w not enough? Currently have Exemplar 2900, room is pretty large, 18x30 and open to other areas. Listening tastes lean to acoustic, chamber, jazz, Steely Dan. Don't need much bass slam. Any feedback on Antique Sound Lab Leyla, AQ 1010, Explorer 805? Other names kicking around: Airtight, Audiomat, Audio Note.
Thanks for your wisdom.