Getting rid of my TC Contender setup is one of my biggest regrets. I had two frames and eight barrels. I had the 14 .223 Hunter with 2x7 Burris and the 21" tapered barrel with 4x12 Weaver. Both barrels were sub MOA with hand loads.
I also had two .22lr barrels a 10" match with a Leupold 4x and an 18 Bullberry with a 40x Tasco Japan. The 18" Bullberry barrel with RWS R50 was a sleeper, that tiny little rifle with a harris bi-pod won many a match against against heavey target rifles on machine rests.
Though you may not want a boomer barrel like a .44 mag the boomers can be big fun. I had the .45-70 barrel and often loaded it up with Black Canyon just to smoke out the range.
When it was loaded up near max a glove was a must or it would rip the skin off your knuckles.
To round out the selection of barrels I had a 12".45/.410 (busting clay with a pistol is a bit tricky a 21" .410 and a 10" .357
Edit:
If you get a 12 or 14" .223 barrel I can pretty much garantee you wil have the loudest gun on the range unless there is an Encore there with a 15" .30-06 or .308 and I highly reccomend you double up on hearing protection.