The JV880 is still a great value. I've seen some of them go for as little as $150! It's sexy and sleek looking. The only problem is no GM - I say it's a problem because you want GM.
There is a psuedo GM mode that can be created if you buy a Data Card and create two 64 patch banks that utilizes GM sounds, but still, no real GM. The sounds are great. Polyphony runs out fast [4 Tones at 28 Note Polyphony]. Some would even argue that the JV I line (JV80/880/90/1000) sounds better than the JVII line (JV1010,1080/2080, XP 30/50/60/80).
The Infamous Epu.