The OP's current fork is threaded, though, so that's going to complicate things if he converts to threadless...........If you do convert to threadless, check and make sure the fork you get is suspension corrected for something like an 80mm travel fork (I'm assuming your "low end suspension fork" has 3" of travel or less). I think the Surly 1 x 1 would be hard to beat for that. At least one of the Nashbar suspension corrected forks I've seen lately is way too long for the typical short travel fork, it's suspension corrected for something like a 5" travel fork. I don't see it on their website right now, though-