Congrats! Until your wife kicks your behind... I just got an iPad 2 myself a few weeks ago so I know just how elated you're feeling right now.
It'd be a whole lot easier to give game suggestions if you could let us know whether you have any preexisting iOS favorites (if, say, you've ever owned an iPhone or iPod), or simply let us know what types of games you typically play, though I've learned that the iOS gaming scene is quite different from the console or even portable experience. The most popular genres on iOS are twin stick shooters, endless runners, tower defense, puzzle (usually physics-based or match-3), management sims, hidden object games, and... Korean RPGs. :lol:
My personal favorite iPad games so far have been Space Miner HD, Helsing's Fire HD, Gesundheit! HD, Infinity Blade, Superbrothers: Sword and Sorcery EP, Quell, Words with Friends HD, and Fruit Ninja HD.