Well i just got a new xbox after my old one being broke since the first Modern Warfare. Things are definitely different.
I wanna pick up a couple good arcade games but im overwhelmed. Also, this is my first time with high speed internet in about as much time!
My favorite games I had before were Puzzle Quest & Galactrix, Shadow Complex, Trials HD, Peggle, Castle Crashers, and Braid.
I have a bunch of others that I like alright too like Catan, Carcassonne, Crystal Defenders, Age of Booty.
But now, I have been out of the loop for so long I'm lost. I've played some great demos but i'd like your input.
I've demo'd Limbo, Warp, Fusion: Genesis, Beyond Good & Evil HD, Bastion, Trine 2, Stacking...all in the last day or two. They all seem cool but I can't afford them all amsg i'd like further suggestions that aren't on my list.
So hard to decide. 
I'm leaning heaviest towards Limbo and Warp...but seems like they would be quick playthroughs with little replay value.
Limbo is so damn immersive though! My heart was pounding at the end of the demo when SPOILERS you get caught in the web and the spider slowly approaches you!
All the games you have mentioned are good. Also battlefield 1943 for multiplayer, torchlight, bastion, geometry wars, deathspank. 
What are some of the best "values"? Games that have replay or are decently lengthed campaigns.
I consider Shadow Complex and Trials very good values.
Bf1943 has good replay value. Limbo is awesome but only about 6 hiurs so you have to milk it.
And Trials hd is fun and long.
Iron Brigade
Bastion is pretty fantastic. Torchlight has a lot of value in the length and content, imo, if you are up for a diablo clone.
if you like tower defense games you must play Toy SOldiers and Toy SOldiers:Cold War...i have enjoyed these games much more than most of my $60 purchases..
Bry Bry - if you like tower defense games you must play Toy SOldiers and Toy SOldiers:Cold War...i have enjoyed these games much more than most of my $60 purchases..
I'm not a big fan of tower defense. In fact, I didn't even know Crystal Defenders was until I bought it..
I'm thinking I might get either Bastion or Torchlight and then wait for Trial: Evolution. Limbo demo was so great but I hate paying $15 for such a short game.
I've never played Diablo as I've always been a console gamer but I love rpg's.
Battlefield 1943 is a MUST. Bastion is a MUST. May I also suggest DEATHSPANK!!
I've actually played through the first two Deathspank episodes on my PS3. They are pretty fun.
I bought Bastion last night, I'm digging it for sure.
Is Battlefield 1943 still pretty active? Got a lot of life left on Live?
For anyone who hasn't played Outland I highly recommend it! One of my favorite xbla games ever
I am alive looks intriguing its out next Wednesday I think.
Limbo, Outland, and Trine 2 are all great and worth the money
Orcs must die is freaking awesome. Gotham city Imposters is fun.