One rifle not mentioned within your price range & worth a look if you can find one, is the Original/Diana 100 ssp.
The cocking method, although a side lever, is a bit "fiddly" but can be overcome by a simple mod.
A close friend of mine who was NSRA 10m British Champion in 2000 came out of retirement a couple of years back. He now uses a Mod 100 for bell target.
Shooting 3 leagues this season (22 match's) so far he has not dropped a point. He has also shot a couple of 10mtr opens & achieved scores of 570 & over ex 600 without any serious training, & all with a rifle that's never had a "spanner" on it & is over 20yrs old......Not too shabby eh!
As said by Robin, Try them all first, make your mind up, then it's down to the "Nut on the butt" ENJOY!
IF IT'S NOT BROKE.........DON'T FIX IT!