Asking a question like this might get a better response if you said what your budget is. Also there is a huge difference between shooting 250 and 500 hp of NITROUS. Callies Compstar line is a very nice rod. It's nowhere near the price of billet Olivers and not near the hp handling capabilities. Another thing to consider is whether you are shooting the nitrous on top of a 600hp motor or a 1200hp motor? Are you running through at 7200 or 9200? A great many variables to think about to get a really good answer. Just my two cents.
Curtis