RX7 wouldnt be that good, as rotars need regular mainenance. If you dont, you wont get away with it for very long, where as an RB/SR is more tolerant in that sense.
Plus the electrics in the RX7's are fairly crap, and the car it self is just too old.
This is my personal opinion..
R33 is good as it has the RB25, but thats pretty much all its got going for it. Exterior wise I reckon they look pretty plain and dont have much going for them.
I mean, they are a newer car, refined production, and thing such as as the drive line have been much improved from the R32.
That being said, I would still take an R32 over an R33 any day. I was hesitant to get mine as I do like power, and get bored of it pretty quick as most do. RB25 would be, or would have been a better option performance wise, but I cant see my self driving an R33.. there so boring to look at.
Future plans for my car would include a different motor, Rb25/26, after that an R33 will have nothing on me!
Its 50/50 in favour of R32 and R33.. just comes down to personal choice.
Thanks,
Abu