Welcome James.
Most people will advise you to pop along to your nearest club and try out a few rifles. The lads at Ponty are sound and it's a fantastic club, you're also in the NEFTA diamond with Ponty,Emley moor, Redfearns and Anston within driving distance and once a NEFTA member can shoot at other NEFTA clubs.
Unfortunately i'm not a springer guru so can't give you much info on the rifles you've mentioned but a lot of people start on the springer path and very quickly end up with a PCP.
You're welcome to pop along to Emley this weekend if you fancy a look around and i'm sure there will be a few rifles around for you to try....if you pop up i've got a GML s400 that you're welcome to take round the course...cup of tea and some nice banter