I'm in much the same position having trained on C-152's in Florida I considered converting to PA-28s as that's all they have in Denham and a pilot friend of mine flies them so thought it would be nice if we could share the flying. Although the cost of doing it (in the region of £1000) has made me think again.
I am going to visit Elstree this weekend and stick to Cessna's after all you can always hire a 172 for touring which is just as good as a Piper and you don't need to convert with 5hrs and a checkride, just need to do the checkride. Plus if your on your on your own you can save a bit of cash and take a 152.
No clever sign off yet