69 z-28 exhaust????

I just purchased a 69 z28 and im looking to put a good exhaust on it to start out.i have to get angle plug headers because the headers on it now are for straight plugs so they "made it work".and it just has 2.5" flowmasters bolted straight to the headers.i can t decide whether i want to stick with the flowmasters(like maybe the new super 40 or 44),or go to maganflow(which breathes alot better ive heard than flows).i have a 350 bored .30 over with the biggest hydraulic cam itd fit,850 holley double pumper and is gear driven with camel hump heads.needless to say the engine is frickin HOT.so i cant decide on mufflers AND whether 3" or 2.5" pipe size.i may be getting ahold of a 427 so that may be a factor to,but thats maybe.what do you guys think

I like magnaflow...they arent quite as mean sounding as the flowmasters...but they flow better. Which may not be a big deal, but if i owned a car as sweet as that i dont think i would take any chances.

flowmaster sounds good.