Best is a relatitive trem...
Some of my personal choices and favorites ( have experience, I own all 3) are:
Slavia 631- Excellent accuracy, .177 cal 600+fps. adjustable trigger. Target sights.
Benjamin 392- Adjustable power, .22 cal. Accurate. Very powerfull hunting rifle! Can be used at low pump charges for plinking.
Sheridan 5mm- Same specs as the Benjamin (nearlly the same rifle) Cal.20/5mm.
QB 78-
CO2 powered (may be bulked) .177 or.22 cal, very accurate, .22 is very powerfull, .177 is extremelly accurate, adjustable trigger.
HTH!
ZVP