If you want a top RV for aeros - get an RV-8, or RV-8A. Tandem, feel great to handle, go like a rocket.
The RV-7 or -7A are much, much more comfy than the -6 models, and if you 180HP them - are faster and better handling.
RV-9 and -9A are actually the nicest to fly in ordinary A-B flying, and have lower stall speeds, bigger flaps, land slower. They do appear to perform better at 10k altitudes too - 12% more wing area.
Never been a better time to buy, even in Oz.
Look for one with a factory new engine when it was built.
The VANS performance numbers are more/less accurate - don't believe some of the bull you hear about 175k cruise. You'll find that 150ktas is the more realistic aim, and you'll get there with fuel still in the tanks.
I've had a -6, now a -9A, but have test flown, and instructed on, the whole range.....except -3's of course!!
PM me if you have specific Q's
happy days,