Exhaust system on Cessna 172

Just got the word from the A&P that the exhaust system
on my 1976 M model 172 needs overhauling because of
cracks and leaks. I'm compemplating replacing it with a
Power Flow Systems tuned exhaust rather than having
the stock OEM system overhauled.

The A&P is guessing the overhaul cost will be about $1k.

The PFS system ranges from $3425 to $3875 depending
on short-stack versus "classic" (long pipe hanging outside
the cowling) and polished versus ceramic coated.

Comments?
Your experiences?
Is it worth the extra $2K or so?

Any place to buy a PFS at a discount, or is ordering from
the factory the best / only option?

Thanks.

Ronnie