I have a RWS 34 and two FWB 300's, very hard to beat German rifles.

 

My first personal air rifle is a Diana 34. It's a decent shooter and tuned by John in Pa. I had the chance to shoot a factory R7 and R9 last winter - very good guns. Definitely a step up without being exotic.
I have a Diana 54 on loan from a friend, so that I could let another friend try it out if she wants to buy it. So I got some quality time with it - it's a bit beastly in terms of weight, and when cocking you have to develop a technique that keeps the muzzle pointed in a safe direction, lets you load the pellet, gives you adequate leverage to pull the cocking lever the full range, depress the anti-beartrap lever, etc etc. I think it's just too big and bulky for her but we've both enjoyed shooting it. I'm planning to sling some more lead with it this coming weekend before I send it home (sale not likely to occur). But it's pretty cool that with the recoilless action, you can lay it on bags and just hammer a one-hole group at 30y with the right pellets. I'd buy it myself if I weren't keeping my rifle collection nice and lean.
I'm still a fan of the older English made spring airguns. Theoben, Air Arms, Webley. They're fetching premium prices these days. Maybe I should sell the Model 34 and make room for one of those in the near future (?!?)

 

Yes the German and British piston guns are the best. 30yrs ago, before Webley and BSA sold out and Theoben shut down, there were lots of choices for a quality spring piston gun. Ive owned most every brand and type in my 50yrs of shooting, but oddly ive never owned a tx200. Had a pro elite once, it was a dud though, but the TX is a great rifle... may have to get one of those before i get too old to shoot it.
Diana was the budget friendly german air rifle maker, but they were accurate and powerful, sadly they are a shell of their former self since umarex took over, mostly chinese junk.
A&W is still top shelf though mainly focused on precharged systems. HW quality has dropped since the 90's, but they still produce great products, just a smidge less quality than 30yrs ago. Robert Beeman had more than a little to do with that though.

 

I had a Pro Elite, bought it used after Air Arms quit making them. At that point the tuners knew the reputation for duds and I lucked out mine turned out to have a properly machined receiver and Jan Kraner did an excellent tune on it. Sold it to raise cash for an engagement ring for my now ex-wife. I'll bet you can guess if I regret selling that gun.

 

I have a 2013 & a 2015 model RWS/Diana 34T06 Classic, 100% German no Chinesium, and they are extremely accurate. I've eliminated more squirrel vermin with these than with my .22 rimfires.