Buy a PS3 and get Uncharted 2! (MAJOR JOKE) I haven't got a 360, sorry, so I can't advise you on FPS's on a 360, but I think the line-up is similar on both consoles. If you're looking for gaming tips, I've got a few:
1) Grenades, grenades, grenades. Keep concentrating as much as you can in a firefight, but always keep an eye on your grenade count. If you're playing on games with different types of grenades, a la COD4, use that to your advantage. Smoke a group on enemies that you are having trouble with, then pick them off at your leisure. Throw a stun grenade in a house occupied by enemies, then kill them while their stunned. My favorite method is to stun a large group of enemies, then take them out with a frag. This way, enemies have no time to run away.
2) Ammo. Reloading is vital if you are to stay alive in FPS's. Make sure that you have a full magazine before entering a fight. Always keep your third eye on your ammo count (not to be taken directly) to make sure that you are always prepared to defeat the enemy.
3) Iron sight versus run n' gun. Know the right time to iron sight an enemy, (use the knobbly bits on the top of your gun) or to run and aim with the reticule. The closer the enemy is, the better it is to run n' gun, but never feel like that is an option always open to you.
4) (Online only) Make sure that if you are to die, your enemy is to suffer also. If close to death, make sure you either drop a grenade, or throw it, as close to your opponent as you can. Because as they say, if you're goin' to die, you might as well take everyone with you. I have people that avoid me online, because of how they always die with me.
Hope I helped.