I think you will find it a whole lot more fun having both springer and PCP. They are so different in so many ways.
PCP's biggest down point is the bottle and refilling it. Most are fantastically accurate, but soulless.
Older springers are fun because they are tricky to shoot well being very hold sensitive. The rifle you have is a pretty good springer. £300 on a good day, and you will regret selling in less than 300 days. £300 doesn't really get you a PCP and all the stuff that goes with one, so its save up for one anyhow.