G.I.,
If you visit the General Arranger Keyboard Forum as suggested by 3351 you'll find a wealth of great info on your topic. However, It can also be very confusing. In fact I've never had an arranger keyboard that I really "loved". I've had a Roland G1000, Ketron/Solton X1, Roland RA50 & RA 90 (modules), Yamaha PSR2100, PSR3000, and PSR9000 PRO. I can't say that I really liked any of them. I still have the 9000 Pro. Mostly because It's been hard to sell and it has most of the features that any or all of the others had. Also, I expanded the ram and added a hard drive so I could utilize the sample playback function. Hey, that might be a possibility for you. In fact I saw one advertised a few days ago for around $1250.00 (I think).
Deaton