Hmm.. I'd actually think a 4th Gen game would be cool, preferably Platinum bcause Platinum is boss, and gives you options on top of options in terms of pokemon choices. Maybe mix it up with an Anime team run, NU/NFE run, or a Nuslocke run, y'know for the sake of mixing it up.
Oh, and Pokemon Raptor EX is a game you might wanna try, if your into it that is. Its actually RPGM2K, so that should be a fun substitude for a ROM hack.