Well you wouldn't most have sponsorship from cartridge companies. I am confident that any one of those you've mentioned would be fine with the cheaper end of the market. Ed Solomons has demonstrated to Liz that you can use a 21g common cartridge to hit some awesome targets if you know what you are doing.
Mainly because they arent the ones they are given (or get a deal on). The trick is to find an inexpensive one that does what you want. I would use my Rios over and above various more expensive ones even if they were the same price.
Which should be combined with the use of a Baikal o/u with 28inch fixed choke barrels.
