A PSU is NOT the place where you should sacrifice quality. That said, Antec and FSP are about the only good low priced brands. I don't think Chiefmax is high on the quality scale.
What do you need to power? How many 12v amps do you need?
The Antec basiq has a 20 +4 main connector which should satisfy the 24 pin connector requirement.
I'm with geofelt. Power Supplies are not the best place to save money. Cheap power supplies are just that, cheap. I've never had good luck going budget on a power supply. They usually don't last all that long in my experience.
Antec is always a safe bet though, if you can find a good deal on one that meets your power requirements.
Also available with the same limitations as above are:
FSP ATX350 PA
Antec Basiq BP350
Both of these are $30 plus shipping.
There are a number of good PSU options in the $50 range. They will include the ability to run a higher-end
video card as well. These have more output options in general and will power a modern system just fine.
My favorite example right now (due to a big rebate) is the PC Power & Cooling PPCS500D.
Called the Silencer 500, it can be had for $50 with free shipping after mfr rebate.
Brand is very important when looking at the low end of the power supply business.
There are very few power supplies under $50 which are solid performers. Those that are will have
very limited expansion options, no PFC and lower effeciency.