If you have a bench grinder or Dremel with a cutoff wheel you can grind the tip down to get rid of the rounded part and extend their life a little bit. The other cheap thing I've done is take the Allen keys included with a RTR, cut the short angled side off and insert them into the handle of my drivers since they have a set screw to hold the new bit in.
I've wanted a set of Hudy drivers for the longest time, one of these days I'll splurge. I've heard pretty good things about Dynamite and Ofna hex drivers though. Right now I have a set of Integy drivers that came with a vehicle. The titanium nitride coated Integy bits are better than their black ones but they both suck pretty bad. They are inexpensive though so I just order replacements when I'm not cutting down extra Allen keys that came with vehicles.