Just tried out Purity from Luxonix. For you software guys out there this might be worth a look.. It's got some great sounds, not all are great, but the organs, brass, basses and a couple of guitars are great imho. It's lightning fast since it's so small, so load times for patches are as good as instant. It supports GM and has a GM set, but the other patches are organized in banks, so you can tweek your styles to use the great sounds outside of the GM bank.
For a live performer, this may be worth a look.