Virus is essential. Sometimes it's the only synth we use, rarely does a track get finished without something off the Virus .. even pop music ... it's fantastic, does nearly everything but the bass isn't that great most of the time (although don't forget to turn phase init to 1 or something if you are using it for bass)

Novation Supernova ... nicer than the Virus for bass sounds, but bass wise does sound identical to a Pro-52 although the editing is a lot better and you've got things like delays on the envelopes which are wicked...

Juno 106 - nicer than all of the above for the bottom end, though I sold mine 'cause it was taking up too much space in the studio and replaced it with a studio electronics SE-1 which also kicks arse in the lead department and has a more sensible midi specification as well as fitting on the desk.

Also we've got an XTk which gets used some days and then not for months but it is great if a little weird. And I've just dug the original Waldorf Microwave out of the cupboard for a track.