Just because you pay more for an exhaust doesn't mean it's going to sound better. I've tried a magnaflow full catback exhaust (I forget how much.. $800?). It sounded like shit. WAY too much drone, too much bass, too loud. Granted I have an aftermarked downpipe.
I've also tried nameless performance axleback muffler deletes. A high quality product. I think around 500 bucks? It was obnoxiously loud.
I've given up for now, unless I can first hand hear something that sounds better than my hogzaust. Also, DON'T rely on youtube or forum posts on here if you're making a decision on which aftermarket exhaust to buy. I was fooled twice by this. The only certain way is to listen in person, to a car that has a very similar setup (eg aftermarket downpipe vs stock makes a big difference).