Both Quantum Leap Silk and RA seem to cover similar territory. Silk seems to have fewer instruments, but looks like it might be more in depth in terms of articulations and whatnot. Does anyone here have any firsthand experiences with both? I would be very interested in hearing about the difference. I think I may pick one of them up, and right now I am inclined to go with RA due to the price and the larger selection of instruments, but is Silk superior enough to justify the extra $200?