Kinda not cool to resurrect a thread like this. A lot of the players have changed since the original posted. HF today is probably better than HF even just a few years ago.
I have a 24" Snap-On that did flat-rate for 40 years before it broke (the "square" broke off through the ball detent). While I was waiting for parts from Snap-On (parts for a 1978 tool took about a week to show up), I bought a 24" SK.
That said, if you're seriously laying into a 1/2" bar, it makes more sense to get a 3/4" for those jobs. More leverage, and a more rigid package. Tekton is pretty cheap, but has a very professional presence, and depending on what you work on, you may be able to get away with just the sockets you know you "need". That means a pretty small outlay of cash, which beats doing a faceplant when a tool breaks... or walking around like a cowboy for the rest of the day because you overdid it with a 24" bar.
-Ryan