EuroOptic advertised an 'extreme trainer' 22RF rifle several years ago, based on a Stiller 2500XR action, Bartlein bbl, Manners stock, etc. I immediately contracted a case of the hots for one of these rigs, but choked on the price ($4000+). Long story short, I bought one of the Stiller RF actions & built myself a very nice trainer, fitting & chambering a Krieger bbl. Since then, I've sent off a couple of CMP 40X actions to have them converted into repeaters, then barreled them myself, then finally gave in to temptation & bought a Vudoo V-22 action & built another very nice rifle on it. A friend who'd shot my Vudoo asked me to build one just like it for him, but since Vudoo didn't have any bare actions for sale, I wound up buying four bbl'd actions from them, so now own three V-22s of my own. Shooting high quality custom bbls chambered with a match reamer will spoil a guy or gal, and make it a little tough to settle for the accuracy of your average factory .22RF rifle. And the relative ease of quick reloads with the V-22's 10rd magazine is a luxury compared to anything else I've seen.
After looking at photos of the new CZ457 American & Varmint MTR rifles, I bought an American to have a classy-looking .22 sporter. I like this rifle a lot, but the jury's still out on its accuracy potential. To be fair, std vel match .22RF ammo doesn't perform well in temps under 40*F (unless you're shooting higher priced Lapua Polar Biathlon), and I just haven't had the chance to wring the CZ out for accuracy in decent conditions. As mentioned, the new Tikka T1x is also reputed to be a very accurate .22, but both these rifles are considerably lighter than any of my CF rifles, so for anything more serious than plinking at tin cans, I'll stick with my 40XB or V-22 repeaters. I've fired something close to 10 times as many rounds of .22RF ammo as I have put through all my CF rifles together in the past four years, and it shows. Trigger time is trigger time, but having a selection of precision .22RF rifles that are very accurate AND come very close to duplicating the proportions & weight of my CF comp rifles has paid dividends. I seriously doubt you'd ever regret investing in a V-22...