Don't the Gaffers flashy pictures fool you - the statisics (currently) don't lie...For me it's guitar hero. Ds - will end up costing you even more! MOH2 - good, but not too different to your collection, the same with No more Heros, both games are like many others.
I've played guitar hero - for the first 30-60 mins you feel awful - then you go onto a song and get possesed by Paul McCartney! I know it's not expensive, but if your looking for different, that's the one!
Zelda, Mario Galaxy, Mario Kart, Guitar Hero: Greatest Hits, Guitar Hero III, Guitar Hero: World Tour, Mario Strikers Charged, Excite Truck, Rayman Raving Rabbids, Big Brain Academy, Metal Slug: Anthology, Wii Play, Endless Ocean, Super Paper Mario
DS:
Mario Kart, More Brain Training, Advance Wars: Dark Conflict, 42 All Time Classics, Project rub, Animal Crossing: Wild World, Yoshi's Island DS, Picross DS
360:
Left 4 Dead, Halo 3, Mass Effect, COD 4, Gears of War 2, GTA IV, Ghost Recon, FIFA 09, Burnout Paradise, Mirror's Edge, Top Spin 3, LEGO Indiana Jones, Kung Fu Panda, Lost, Battlefield 1943, Portal: Still Alive, Geometry Wars 2: Evolved
I said MOH2 because of the multiplayer giving you bags of replay value. Guitar hero will do this too but playing the same songs over and over again doesn't do many people any favors in terms of replayability. Lets just hope they bring out downloadable content for the wii version soon (and sort out the mono sound issue!) Either of these games you would probably like it just depends on what sort of game you would like better and how long it will last you....
Happy Bday!
CALL OF DUTY: MODERN WARFARE REFLEX FRIEND CODE: 5285 9793 1356