This is an old post that I only just found and read intently. With the exception of PCP's I'm an "All of the above!" guy.
I can't say I shoot springers well compared to many here but I have a cheapo "Browning" MIC underlever in .177 that shoots Barracuda Match pellets (from a rest) very well to 40 yards. It's got a Leapers 3-9x32 AO scope that replaced the junk one it came with. Took several years of shoot, get disgusted, stick it in a corner, repeat, etc., before I finally cleaned up the really rough bedding and compensated for the crooked forend using pieces of rolled roofing rubber thicknesses and front screw torque combinations before it hit where I thought I was pointing it. I probably persevered on it because it wasn't worth anything to sell, and none of my shooting friends would even take it as a Christmas present.
More recently I stepped up to an HW50S & HW30S, also.177. Not cheap but not wildly expensive either. Naturally both shoot as advertised, although I have not shot either very much beyond 35-40 yds, which is the distance from my back deck to the barn & another outbuilding a couple old woodpiles and 3 or 4 big walnut trees. Red & gray squirrels, chipmunks, starlings, house sparrows range.
I have an original Dragonfly and a MK2 , both.177. The original shot very well at the same ranges. It's corner-parked somewhere upstairs since I got the MK2 which is a better gun in every respect, plus stupid easy to pump. It's easier to shoot well and like the HW50 is minute of squirrel head at 35 or a touch more. That MK2 is a keeper.
I use a Remington 511 22 LR for groundhogs, occasionally the other species if I'm shooting from an upstairs window or out around the barn/field/woods.
I bought a CZ 452 American 17 HMR right after they came out and it's without question the most accurate rimfire I own, MAYBE the most accurate rifle period at 100 yds from the bench. Might be a toss up with a stainless Winchester 70 Classic 300 WM with the BOSS adjustable muzzle brake/tuning thing and Nosler 165 BT's. Bought that one the first year that combo was available. Best 100 yd group I ever shot with it, from a so so public range bench and sandbags on a 95 degree South Carolina day, was 7 shots that a dime covered with a little room to spare. With a witness, too.
For me and my shooting skills a pellet gun won't hang with the rimfires or centerfires at 50 or further, so I just change guns to suit the situation. I am fortunate to live somewhere I can.