Yak 18T
Been a fan of these beasties for a few years myself since reading a pommy mag with an 18T, 4 up doing loops, though when I'm suitably insane I think I'll be going down the 52 route, maybe a 52TW.
Also seen an 18 W with a one piece bubble canopy, cleans it's looks up and looses its military image a little.
Being an "experimental " category aircraft has some legal issues for touring which I assume being a 4 seater you'd be thinking of doing rather than just aero's but you'd be best talking with the likes of Lindsay Sinclair @ Redstars, he's put a few on the local registar and would be worth a chat.
Too much fun to be had and as has been said we're a long time dead.
Do it !