I was able to program a lot of decent patches for Model-E, but you could really hear the oscillator aliasing and they sounded a little thin. Since it was one of the first VST instruments, I think Steinberg was concerned with cpu usage for pIII cpus, so they skimped too much.
For pads, check out Rhino and for rhodes, definately check out Lounge Lizard.
Another quality synth is Native Instruments FM-7 (Yamaha DX-7 emulation).
I'd highly recommend Linplug Albino as my current favorite. It's presets are programmed by the same guy who programmed most of the Access Virus presets and it has great oscillators and two types of multi-mode filters.
-=bumpus=-