That Puma is a cracking start. Power is very little to do with fun on track.
I'm 10 miles from Castle Coombe. One of the most memorable performers I've seen there over several years was a local lad, in a red Mk 1 Fiesta that was his first car, and - later - worked on, and worked on, and stripped out to c. 700kg, by when it sported a totally, thrashable-reliable NA 2L engine of c 150hp - every time he was out, he went around a lot of things of twice that power or more - and made it look easy. The key - I think - was his keeping the scope focused; on development: knowledge of the car, the suspension, of his driving. That was all!
Absolute masterclass in having & holding an idea, rather than simply 'buying the gear'. And fantastic VFM from every perspective.
(and that far in - if he stacked it, as he said himself, he could now replicate for about £1k ...)