I'm all for UPSes, doubly so if they have true sine output (the stepped sine approximation can cause some larger transformers in amps and plasma TVs to buzz), triply so if they can provide greater than 15 Amps of current for short periods when the batteries are full.
Pioneer VSX-1018AH-K, PDP-5020FD, DV-79AVi
Axiom M22s, VP150, QS8s
Sony PS3, surround backs