bitflipper
I despise sampled analog synths!
The lines are becoming hazy in this area. With the latest Kontakt technolgoy, a lot of new sampled libraries come with filter and other modulate-able timbre altering controls. Look at the Music Lab Machines libraries, mentioned earlier in this thread, for example. So don't write this sort of sound generation off as boring inflexible imitations of the real thing. To a certain degree it's the best of both worlds: rich sloppy analog wave forms with real time modulation possibilities in a convenient digital form.
And there's a new(ish) bundled set of sounds that came with the latest Kontakt offering a collection of vintage synth sounds. I don't recall the name of the library, but it's got an obvious name. I've haven't explored it deeply, but I was extremely pleased with many of the sounds there. I don't recall off hand the degree of modulation that's possilbe, but the basic sounds are quite good.
As for Synthmaster, I was very impressed with everything there in the instrument, but not overly excited about the bundled presets. However, the new line of classic synth sounds by Nori (discussed in another recent thread) are a delight, and are fairly inexpensive. If you go with Synthmaster, you'll surely want to give those a look, I think.