My suggestion would be to get to a store where you can handle all three of them. I personally buy my guns largely on the basis of feel. I like the feel and functionality of the Triumph the best of the three you mentioned. If you're going to shoot powerbelts or other conicals, then as suggested you might want to lean towards CVA-although a couple of guys on here don't have problems shooting conicals in their TC's. I guess it's hit or miss-no pun intended.

You asked about the cleaning, I highly recommend the new powder that has come out Blackhorn 209. If you shoot it, cleaning between shots in not needed. Any other of the substitue powders yes, I would recommend you swab between shots to get the best accuracy you can. But w/Blackhorn I can shoot all day and still get as good of groups when I leave as when I got there.

Cayugad made a very good point though. If you're set on shooting conicals buy a White. I've never heard of a White that won't shoot them very well.

Good luck on your new purchase!