In all honesty it's not worth going NA anything, pain in the neck to convert everything over if u want to go turbo (or better, wastelanders no what I'm on about). Rb20 natros are painfully slow same can be said for ca18s, best bet is a natro sr20 or late natro rb25 32.
If I had my time again I'd stick with my daily and not buy my natro 33.... But it's up to u man.