Depends how much you want to spend, and how skilled you are.
Kona and Norco make some nice ht's. Check out the norco 250 if you are on a budget.
If you've got money to spend, check out .243 racing, Snipes, Balfa.
If you've got LOTS of money to spend, check out some of the more premium lines like 24 Cycles (the Le Toy is one of the sickest bikes around) or the Imperial from Evil Bikes (VERY expensive...$1000US for the frame alone.
Go check out the links section on nsmb.com for the company sites.
'I am going back online. I feel safe there.' - Piot Modrak aka lord_piot