How about an Anthem AMP-1, there is (or was) one on Audiogon today for $480, and they can generally be had for around $500-$550. EL34 tubes are also plentiful and cheap.
I own the Wave 8s and use them with 89db 8ohm BA A60 bookshelves. They get the job done volume-wise for my bedroom system, but they don't make it to the loud side of loud. 88db and 6ohms is an appreciably tougher load than 89db and 8ohm. So as TWL states, not quite enough, I'm afraid. Great and fun amps, but not powerful enough for your speakers.
I keep hearing the "reliability issues with Jolida" phrase, but I don't recall ever seeing that discussion on Audiogon. If you're getting that vibe from audioreview.com, I'd take it with a grain of salt.