Good advice, Foxmoth.
I cannot see how any high wing monoplane can be much good at aeros. I never met one that was and if there is one out there, the C150 most certainly is not it. Frankly, I have had more fun in a BN2 which barrel rolls (empty) quite nicely.
Sadly the days when you could pick up a DHC1 for little more than the cost of the inner wing bay mod have long gone but I would echo your sentiments here - if finances will run to a share in an aircraft which has the best harmonised controls of any I have met in nearly 60 years of flying and is truly delightful in every respect (apart from flat spins), get a Chippie. Quite magical.