it sounds better with the new 303, the synth is still a bit plastic though.

for someone who makes so much acid, i'd seriously reccomend buying a cheap hardware clone. you can get F.A.T. 383s for as little as £75 second hand. they don't sound eactly like a 303, but they have a vibrancy and 'real'-ness to them that smash any vst. plus turning a real cutoff nob is a fckin nice feeling.

failing that - try running your vsts through a(n analog) guitar distortion pedal - should warm up the sound a bit.