Wii games

Justin and I got a Wii for our anniversary, and we've been having a lot of fun with it, but now as we go into winter, and have more time to play, we're noticing that we need more games! So - I know there are several people that have Wii's and I'm wondering - what games do you recommend, or what games have you heard good things about?

We have: Super Mario Galaxy (Justin is really good at it, but it just makes me mad in a very short amount of time), Wii Play (with classics like duck hunt and tanks), Wii sports (sports games are okay, but we're not much into sports), and Mario Cart (love it). We also have 2 other lame racing games that aren't as good (I learned not to buy the cheap games) I think one of them is GT series, and a monster truck game, but not the good one by Monster Jam.

So we like good racing games, two player games (but some solo games are good too), we'd like a shoot em up game that isn't too gory or over the top, um, adventure games are good too, where you have something you are working towards, or a goal to accomplish. Justin likes Halo on the computer, so if there was something like that you've heard of in Wii? Really just any suggestions. We don't have a lot of money to spend on games, so we want to make sure we get good games that we will get our money's worth out of. Any suggestions????

Oh, and our Wii is not online, or hooked to the internet in any way, if that makes a difference. . .