My enthusiasm is tempered by Universal's questionable track record with Blu-ray.  They've been frequently criticized for excessive grain reduction.  The worst-looking Blu-ray I own is probably Universal's TREMORS, which has had all the grain sucked out, leading to a lot of ugly shots that look overprocessed and unnatural.  So although I'm eager to upgrade the Uni Monsters to HD, I think I'll wait for some reviews before placing my order.