Best place to buy a new muffler

Time for a new muffler. The old rolled-seam pos on the jeep now has parted all along one seam about 3/8".

I'm thinking (after reading here and elsewhere) that I should stick a 2.5" cat back on with a Flowmaster Delta 50 muffler (XJ is 2001, 4.0, Blue). The cat looks good and I don't want to buy a new one right now.

Who has the best price delivered on one of these?

Also, on Rusty's site they say that you need to do some fabrication on their cat back to fit on 2001's. Any one done this or know what I'll have to do extra? And finally, is the Rusty's air tube intake a good deal or a problem waiting to happen?

Thanks for the input!!

I like the Flowmasters for the strength, and sound...I've come down on mine pretty hard, it bends, but stays in one piece....I've always ordered the muffler itself from Jegs or Summit...I've never bought a cat-back system...IN fact I don't even run a muffler any more just to gain ground clearance...What are you expecting Rusty's air tube to do? I bet its 80% looks and 20% function...