"the part where a disembodied arm grew a mouth on its palm and crawled back over to its previous owner to suck on his nipple uggggh"
Oh c'mon, Rice totally ripped that off from SGA!

Have you read Blindsight by Peter Watts? It's the most sci-fintake on vampires ever, and rather dark, but very well written and gripping. Not typical tropey stuff though. It's free at his site: http://www.rifters.com/real/Blindsight.htm