I'd go with an SSP too... Beeman p17, HW40, Gamo compact. HW75 is nice but a bit more expensive.
Or if PCP the pp750 I just bought seems decent for similar money, but you'll need a pump or tank.
Springers; the HW45 is a great option IMHO, but like the tempest, the recoil is "backwards".
You could always start with the tempest and see what everyone else is using over the first few weeks. The gun club won't really care what you are using, so long as you are safe.
Always looking for any cheap, interesting, knackered "project" guns. Thanks, JB.