Need a BK or two before this sector settles out, IMHO.
You should never try to bottom fish, better to let the trend develop and then jump on. The risk trying to pick bottoms far outweigh the few percentage points you will lose by getting on the train AFTER it has left the station.
With that said, if I felt the need to look at this sector, I would look at XHB. It is an ETF basket of HBs. Trying to pick individual HBs is like Russian Roulette right now. Who knows which ones might implode? Better to play the sector for the rebound you may feel is coming. Personally I don't think we see a comeback until 2 HBs go belly up, median home prices retrace 20%, and the regulatory bodies step up and start enforcing the rules on the lenders.
Anecdotally, my brother is in construction in the Philly area. His job involves the final tie in between a newly constructed home and some public utilities, which is not completed until a week before settlement. He spent 6 months laid off last year and every friday when he gets his pay he dreads the office trip as it may mean a lay-off. He says they are barely getting enough work for the crews they have on and a 5% drop in work means layoffs, 10% or more and half the crews hit the queue. This tells me we haven't turned around yet.