This month is a great month for gamers (kinda...) There's so many games coming out this month that the only problem is not having enough money to buy them and enough time to play there. Here are some of my suggestions:

-Viewtiful Joe 2 (great action game with a lot of style - GCN/PS2)
-Baten Kaitos (An awesome RPG by the developer of Xenosaga - GCN)
-Metal Gear Solid 3 (It's MGS... nuff said! - PS2)
-Gran Turismo 4 (If you're a racing fan, this is the ultimate game - PS2)

I personally like Metroid Prime, so MP2 is pretty high on my to-get list, but it's pretty much the same as the first, so I wouldn't suggest it for you since you didn't like the first one.