Just can't get enough expansions! Am I going to have to thin my decks?

[jaybiz]

Hey everyone, first post here :).

I recently bought the original Fantasy Munchkin and my friends and I have been enjoying the hell out of it. I then picked up Need for Steed and De-Ranged, which I promptly added to the original. And man, they have definitely improved an already great game.

My question, and worry, is this: If I buy more expansions, am I going to have to selectively thin my decks? The group I play with is by nature pretty cutthroat (we all delight in some Munchkinly treachery), and I can (kind of) already feel the thinning of backstab and "OH ****" type cards as well as the addition of more soft bonuses in the form of steeds and hirelings. Not at all a bad thing, but because of our play style, it'd be nice to balance that a bit.

I guess my followup question would then be which expansion or expansions I should look at purchasing next.

Thanks!