Meta Knight's pathetic excuse for power and knockback shows that Sakurai at least made an attempt to balance out characters (which is a lot more than can be said for Pichu, whose trophy even admits that he's insanely weak and handicapped). And it's not like Meta Knight dominates single player mode and casual play (his really light weight takes its toll on free for alls with three other opponents racking up damage, not to mention he can't take a hit from most items at mid percent, and even on Wi-Fi, Meta Knight players don't even win 1/3 of the time). Meta Knight is mainly unbalanced in competitive play, and really, Smash Bros. was never meant for that in the first place, with it's four player frantic random gameplay (even the original Smash Bros. didn't have a truly neutral stage).
Honestly, if you're going to keep hating on Brawl and stick to your biasedness for Melee, go ahead and ruin Smash Bros. for yourself, but don't go making people shun a game they haven't even tried out before. That's all I'm going to say because this has gone off topic enough as it is.
Anyways KaiserDragon, I should've asked, will you be able to play local multiplayer games with friends often? That'll be a central factor in picking some games, especially ones that revolve around multiplayer like New Super Mario Bros. Wii and Mario Kart Wii.