I think he wants a Grumman Tiger next.
I have a share in a Cheetah (Tiger with a smaller engine and lower MTOW) and love it for touring, as well as very much preferring it to fly and instruct on to the standard Piper and Cessna products (not that I dislike the PA38 or C152, although I find the PA28 and C172 dull and heavy) - a Tiger would be nicer still.
I've never flown one, but suspect that BPF's views on AA1s may well be good here in the UK also - there's a reasonable amount of expertise around on how to operate and maintain them, and Mattair at Bournemouth are a very ready source of spares if needed for all of the Grummans.
G