I think Ben is right by at least making him aware that there are other brands out there as well to try to create his own exhaust tone. It makes one unique and his/her car stand out if they have a cool but different sound to it. I'll have to agree.... waaayyyy too manycars out there running flomasters. I really get a kick out of those guys witht he '87 Camaros with 305's and 2 chamber flomasters....like there's really a big block in there. I'm not knocking FlowMaster, heck I have a pair on my truck. Thank god it's a 351W because it doesn't sound like the ever-knowing 5.0 mustangs. For some reason, be it extra pipe length of the larger cubes or firing order, it doen't even sound close to the typical 5.0L fords that you'd expect. I just ended up with these useds ones and I need muffs for my truck otherwise I prolly would have ran Super Turbos or Flo-Techs.
Bob is right aswell. FlowMaster came out with a tone that caught attention and they marketed it full bore. Though if you take note, if flomaster really wanted to control the market they could easily lower thier prices and grab the whole market in all. But I'm sure thay intend to keep things competitive and that's why I'm guessing FlowMasters are kinda still pricey.
I went out on a limb and tried Super Turbos and 2.5 exh on my Duster. I had no idea what it would sound like but I just wanted something different. At first they were a bit too quiet. But after about 2 weeks of long hard freeway driving, they broke right in and sounded great! I get followed off the freeway and stopped at gas stations all the time by other Mopar guys or what not asking me what exhaust I have. They are amazed that I tell them they aren't any of the more popular brands.
Really it's to each his own. I encourage trying muffs of your own and shoot of a more personalized tone, but that may not be your cup of tea. Some guys are on a budget and cannot aford to "experiment." I understand that so naturally you'd go wht what you already know. That's cool.
Personally, I'd recommend 2.25(quieter) or 2.5 piping with a 3 chamber Flomaster or a Super Turbo. There is also a mimic brand of FlowMaster called a Flo-Path by MAC. Never used tham but have been told they are just like FlowMasters. Summit also sell a fully welded muff pretty reasonable. It's a fully welded unit just like a flowmaster but not sure of it's sound. I think the Summit units are actually Flow Techs, just Summit branded.