If it's any help, I'm a coach/instructor with a club that uses it's allotted quota of guest days as fund raisers for a Forces charity & various GB shooting squads.
On an average day, we see about 35 to 40 guests trying out four different disciplines at Bisley with the aim of letting them get as much shooting as possible during the day.
My particular speciality is in gallery rifle where we use the S&W and over the past four or five years, I can honestly say that I can count the number of problems we've had on one hand.
With regular and sensible cleaning, they just seem to go on & on using both subsonic & HV ammo (normally CCI MiniMag but whatever you do, don't use anything from Eley. It's filthy ammo & you'll be stopping to clean the breech face every 20 rounds - ask me how I know

).
Despite the abundance of polymer, when fitted with a simple red-dot sight, these rifles are great fun to shoot and have never failed to raise a huge grin from everyone that uses them, both experienced shooters and those that have never picked up a rifle in their lives.
Don't get me wrong, Kriss Defiance & Tippman are good rifles and are very effective in competition, but they are a bit on the pricey side if you just want to have some fun plinking.
Just my 2 pence worth but whatever you get, you'll enjoy it.
Iain