Should I buy an Xbox 360?

So, a while ago I asked for suggestions on what to buy with a $150 gift card to the Dell Store (random, I know, but I got a screaming deal on a TV and it was included). A soundbar is an obvious choice, but what about a 360?

I've been a Playstation guy my whole life (happily so), but lately with the impending death of the 360 I feel like I should probably pick up a brand new one while I can. I do love the first few Halo games, and obviously the Forza series is a big draw, even though I'm a little late to the party at this point... is there anything else that I'm really missing?