RE: tc omega
The reason I bought an omega is because it has been around for awhile and many seem to like it. The triumph is a nice gun as well and that was what the salesmen recommended at the time I bought the omega. But I just seemed to like the omega better but will probably buy a Triumph in the future.
As far as load combos the shock wave/ Hornady SST 250 g seem to work well. Plus the Hornady 240 HP XPT works in mine so. All with Pryrodex or 777 pellets.
Just tried the Barnes Spit Fire 245 g and they are pretty good they are just pricey and I need to shoot a few more of them yet.
You won’t go wrong getting the Omega but shop around and read reviews and that will help you.