I'm thinking of building up a single speed hardtail. Any suggestions on a cheap frame that isn't total junk? I'm not too familiar with all the subgenres of MTB at the moment but I wouldn't be going as extreme as some of the downhill/dirtjump business though I already have a cyclocross bike that would be fine for flowy singletrack so I'm shooting for something in the middle. Is there anything like that in the $200ish range or is a Surly 1x1 at around $400 about as cheap as you can get good quality?