Firstly, welcome to the bbs.
Before you decide on the
model of rifle you want to buy, you need to choose the
type . Your actual choice will depend mainly on your budget and you don't say how much you are prepared to spend. From your HW97K/TX200 comment I suspect you are in the market for a quality spring powered rifle that will give you decades of good service. Both the Weihrauch and the Air Arms are in that category. You will also probably feel the need for a telescopic sight.
Both the HW97K and the TX200 are underlevers (you cock the rifle by means of a lever underneath the fixed barrel) which are heavy and more fiddly to load especially when you are cold. Personally I would shoot in the field with a
break barrel design and don't let anyone tell you that a quality break barrel isn't accurate or that the barrels get sloppy in the jaws of the action because that simply isn't true. Modern quality air rifles will literally last a lifetime and should require very little in the way of maintenance. For example a modern spring should easily last you for over 10,000 shots before you would consider a new one.
Moving on to what rifles to look at, unlike many on here I don't like the HW99S half as much as the
HW95 which for my money is a fantastic rifle and probably would be my number one pick. This is not to say the 99S is a bad gun it most certainly isn't but the 95 is better. I also very much like the
Walther LGV. Whilst I love the heavier and bigger
Weihrauch HW80 I wouldn't recommend it to a new shooter unless I knew how big they were! What might surprise you is that most of us on here will recommend you to choose a .177 rather than a .22 and I certainly will join them.
Finally you really should join a club and get to try as many rifles as possible before spending your hard-earned cash. Good luck and enjoy whatever you choose.