I have a battery of HW97K and AA TX200 rifles and don’t think you could go wrong with either. All have had significant tuning work, either by Motorhead or more recently on my own. All will shoot 3/8” groups or less at 20 yards, and sub 1 1/2” 10 shot groups at 50 yards. I have both the HW97K and TX series in .177 and .22. If I were buying for field target it would definitely be a .177. If I were buying strictly for metal silhouette or pesting, it would be in .22. If I were limiting myself to one rifle, and based upon tens of thousands of pellets, it would be a .177. Either rifle series is an “heirloom” and will last for generations, but the TX is definitely the nicest finished springer on the market today.
The underlever cocking rifles simply hold their accuracy much better than the break barrel rifles, especially over time.