If I were in your shoes, I would seriously consider the Yamaha DGX-500, which provides you with a lot of the same features that more expensive arranger keyboards offer, but at a substantially lower price. Lots of great voices, styles and it has 88 keys. It sells for about $599 in most retail outlets, however, some online stores sell it for less and throw in free shipping.
[img]
http://us.st11.yimg.com/store1.yimg.com/I/tech1global-store_1883_1031397[/img]
Good Luck,
Gary
------------------
Travlin' Easy
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)