Choosing my Next Springer Vote

All three excellent rifles, you can't go wrong with either one. But my personal preference is the TX200. Look, feel, finish, ease of maintenance, and accuracy are superb with the AA. The only negative thing I can come up with in your list, is the build quality on the Diana's recently, since they where bought by GSG. So if you go for a Diana, get one that's at least 2 years or older. 
 
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Maybe this will help? :p

 
Congratulations ChuckHunter. I think you’re going to love the rifle.

markfina: Thanks! Although I have never shot an HW97 KT, I’m sure it’s also a sweet gun based on the many praises from those who own and/or shot one. I don’t think you’ll regret getting either of the two. :yes:

I’ve had the gun for ten years now and have fired over 150,000 pellets with it (though that’s a conservative number) and it is still rock solid and has only gotten smoother. In all that time it has gone through about seven mainsprings and five piston seals (with the mainspring replacements being because of accidental discharge without a pellet in the breech). The TX200 is built to outlast the shooter with proper care.