Hmm.... Well, given your thoughts upon it, I assume by "equal value" you mean "of equal monetary value" and NOT "just like MoH".
I guess my next question would be this: what systems do you have? It's kinda hard to judge what to demand you to get something when one doesn't know what you play on >.< That and I haven't really kept up all that well with the unwieldy game market as of late. But for the sake of needing at least one game on the list, I can give a cross-platform recommendation, and that would be Red Dead Redemption. Got that game just before Christmas with my bulging paycheck, and most every moment has been a blast; beautiful scenery and characters, great voice acting, good game mechanics, tons of stuff to do... If you played GUN (by Neversoft) in the past, it's basically like that game with a larger world, more to do, and more polish overall in general.
The only real downside (besides the fact that they could've called it Grand Theft Western and gotten away with it) is that the combat is rather easy, what with the quick-flick aiming and all. Even then there's a bit of challenge, as you can move the crosshairs (represented by a nigh-invisible DOT in the center of the screen... god that's annoying >.<), but once you discover Dead Eye, the game just becomes almost obscenely easy. Doesn't detract from the fun a whole lot (at least in my opinion), but it is something to consider if gameplay is your thing. Still, this is a Rockstar game, and it plays and feels like one to the very core.
Not sure about the expansion Undead Nightmare, but meh... my zombie love generally only goes as far as the headcrab monsters from Half-Life 2 - and no I haven't played either of the L4D games, and don't really plan on doing so for personal reasons :\
