I mostly work with VSTi's
It's absolutely incredible how far they've advanced since I first started playing about with them at college in 1999. What was just a load of shitty bleeps is now, in my opinion, as good as he real thing.
I also have a Korg Triton and an Akai S3000XL sampler, but the Akai is pretty much defunct these days. The NN-XT sampler in Reason is just as good.