Ok, here is the deal,
Try to Get one of the following GEM keyboards:
SK880: 88 keys no speakers
SK760: 76 keys no speakers
WK6: 61 keys with speakers.
wk8 (Not WK8SE): 61 keys with speakers but all options included.
These have the best and the most powerful sequencer and midi-playback functionality added on midi configuration. Now you can get them for EXCELLENT PRICE; a discount that is more than half what they used to be sold for a year ago.