Yeah, I'd say that's a sweet deal. Just make sure you can return it if you get it home and something goes wrong within 30 days. Granted, you'll probably have to throw some extra dough in the pot for a new one (same model) though.
But covered by full manufacturer warranty and a 4 year extended for 100 bucks....yeah, no brainer.
Klipsch RF-52 II // RC-52 II // RS-42 II
Klipsch KG 2.5