There are plenty to choose from that will give great results, the Gamo Compact is a perfectly capable SSP, as is the HW40, FAS604
Another option is to look for a used older match gun ie: Walther CP2/3, Tau 7 , FWB C10/20 it all depends on your budget and what you want to use it for,
For a decent target pistol that is recoilless without the need for bottles of air or gas the Gamo Compact is pretty hard to beat for the price, a used one is normally around the £100 mark