Are these worth it?

Hi,
Looking to put a new exhaust on my 408 Dart. I'm going with the Doug's D453s and i'm looking to dump the exhaust in front of the rear end. I'd like to go with flow masters.

Was looking at these and just wanted to get some opinions.

Amazon.com: Flowmaster 817574 American Thunder 409S Stainless Steel Dual Dump Exit Cat-Back Exhaust System with Aggressive Sound: Automotive

I'm thinking out of the Dougs, into an X then into these.

Thoughts/opinions?

just my comments,, looks like a lot of $ for two mufflers and header connections,
for that cash you could get a welding class, and the parts,, the welder would be +$ but you would have the skill.
just a thought,, if you are a bolt on an go person,, maybe ok.