mgomez,
Some may not agree but I bought the techno expansion board and am dissapointed with it. The loops are largely useless and the vocoded sounds are a valuable waste of PCM ROM! There are some nice pad and lead sounds and the drum kits are OK but that is about it. If I could sell this board for what I paid for it (and I can't!) I would get rid of it!
I bought it origionally thinking it was the 'Dance' board with a different name. Boy was I wrong!!!!!!
The older dance board (which I couldn't get anymore because Roland got sued over it for copyright reasons) was much much better.
The loops were very useful and the other sounds were great. Although some of these patches are a bit dated now (this was in 1995 afterall!) they can be reprogrammed and the onboard drum kits are great also.
I have the MDC1 Dance expansion module for all these sounds and it is used very often!
Also check out the Hip Hop board for slower (bad excellent) loops and fantastic patches and drum kits. This board rocks!!!!!
I don't personally recommend the techno board but give it a try because everyone's opinions/tastes are different. Cheers.