Surround Sound

My fiance is not an easy person to shop for. He is really picky with his clothes/shoes, which is about the one thing that I'm really good at shopping for. I've been really thinking hard lately about what to get him for Christmas and the only thing I can come up with so far is a home theatre system. Day after day after day he is consistently taking about how he wants surround sound and how this movie would be so much better with surround sound and the music on this channel would sound so much better with surround sound.......yada, yada, yada!

Well folks......here's my dilemma: I have no clue where to even begin shopping for this item. Do I have to go to a store like Best Buy or maybe a department store like Sears? Or would someplace like ABC Warehouse have this? I am stumped. And my next question is....how much does surround sound even cost? I might be in way over my head here!