Maybe I am missing something, but the 1000 is NOT monotimbral, and no sampler that I am aware of will allow you to use the Mono's parameter locks any differently than you do with the 1000 (you are using MIDI machines to sequence the 1000, right?). Please correct me if this statement is wrong. The obvious solution is the UW, but I'm not sure you have an extra $1600 sitting around.
I would also disagree that the 1000 is a "bad" sampler. Not quite as fully featured as say the S5000 or a software sampler (or the UW
), but still a great sampler. If you must use hardware and need more features, I would probably say the S5000 or S6000. Personally I would stick it out with the 1000 though, or go with software.