Most used headers are around $100 unless powder/jet hot coated. Mac's do seem to make good power but most don't car for Mac. I have them and the only issue I have is the back pass side spark plug is a PITA to put in and I have to watch my plug boots as I have straights and they close to the headers sometimes. Used single flange headers can be a PITA to put on as well as the heat can warp them. I have used Mac's on my car and it went smoothly. Most will tell you un-equals or long tubes because it makes life easier.
Yeah the Mac's are good power wise, but once you've used them the individual flanges sometimes warp from the heat and are super hard to put back on, not to mention equal lengths are a little harder to install than unequals, but if the price is right and you don't mind a little elbow grease putting them on, then go for it.
I went with BBK longtubes. Every thread that I have seen with "lts vs. shorties" just about everyone says that lts are a PITA but worth it. I have BBK 1 5/8's laying in my room waiting to go in.