There's a Bolkow for sale in this months Free Pilot magazine.
I do agree that a Pitts would be the most bang for your buck. However they are only single seat so no taking your mates for LAROSA.
I'm sure that you will get bored with the limited aerobatics capability of the RANS etc. The Pitts will last the longest until you get bored.
Have you thought about getting a share?
ZA