Best deal on second guitar controller (360)

Hey guys, I was wondering if you could help me out here. As a college student I can't really get by on only the one Rock Band guitar (that's my preference, I don't want to hear it) if I want to have some sweet 4-player Rock Band 2 sessions.

I know Newegg is selling the wired GH2 Xplorer for $17 with free shipping. Should I go for that? I also saw Toys R Us selling the same thing for $10, but the shipping kills it.

Also, would you recommend I get a game as well? I've only got Rock Band 2. World Tour seems to be on sale today at Amazon with the guitar for $45 but I've heard the game is mediocre. Guitar Hero 5 is probably way too expensive right now.

Thoughts?

world tour is actually good, it isn't mediocre. If anything guitar hero 5 is. Most people are trading it in for Van Halen. The world tour guitar is indeed mediocre. The gh2 xplorer seems like a good deal though.