I'm a bit confused by what you're asking. Are you just wanting a vsti with good sounding electronic samples? Or are you having trouble triggering samples with the keyboard to begin with?
OK, then you'lle be fine with Shortcircuit.
You can stack samples / create groups of samples, trigger some samples depending on the velocity (for example a soft samples for 0-100 and a harder one for 100-127), it has multi outs, lots of effects, pitch tuning, enveloppe control... etc.
The only thing lacking is some kind of round robin / random samples kind of thing, but for electronic music it's OK.
Hmm that's strange.. they either recently decided to start selling it, or I just forgot that I was using a demo. Not really sure. But its really cool because it can load up other vstis and then it can copy any patch from the vsti. It creates .wavs of every velocity/note and stores them. And then it makes its own patch put of them. Pretty sweet if you ask me.