I just read the exact same thread on KVR...well, with subtle differences..
Anyway, what I don't get is...why is this a choice between them? Alchemy is what..€200 or so? That's change on a Virus, so why make two threads about it..?! Get both!
I have alchemy and love it to death, but I am still considering hardware - in fact a Virus TI2 and a Moog Voyager...and perhaps a DSI Prophet 08. See?