Want a good exhaust but don't want to break the bank.

I have a 2001 XJ and I want to put a new exhaust on it. I had put a banks monster on my old 98 and my dad took a look at it and realized the muff had rotted out and the rust on the tailpipe was bad enough for several large leaks. I put that exhaust on 3 years ago. Granted, that was in florida. But I'm worried about that happening again.
I've been looking at performance curve systems with flow master or magna flow muffler. The cat is in good shape so I'm not touching that for now, and I've heard too many horror stories of changing the headers.
Will either of those mufflers direct fit on the pipe, or do I need an adapter? And what type of hangars work best? Or, what other exhaust should I look into?
Sorry for all the questions. Appreciate any info

Following...

If the output of the cat is stock size I'd be tempted to source a good stainless muffler (no recommendation there, other than that the Walker Quiet Flow is neither quiet nor particularly stainless, that's what I used on my '99) and one of these tailpipes

http://www.mandrelbend.com/gallery.asp?ContentId=109

I used this muffler

https://m.summitracing.com/parts/wlk-17656

Went to an exhaust shop and they fabbed the rest, cost me about 150 for everything. Its held up for 4 years no issues.

X2 on a stainless muffler. Just find one with a center inlet and outlet(or whatever the stock setup is) at 2.25" on both ends. I'm pretty sure I've seen a stainless tailpipe out there somewhere as well. Order these 2 parts and have your local exhaust shop put them on. Most exhaust websites have a seach tool where you can input the size of the pipes and all that, then just youtube them to see what they sound like.

http://www.rockauto.com/en/moreinfo.php?pk=269160&cc=1373666&jsn=383

I ended up getting this. It was an easy install came with everything I needed. Its quiet inside and at idle. Very happy with it. When I bought it the price was $99.00 though.