[03machstock]

Hey guys, finally looking to get some new tires, and throw the afs 10.50s i got a couple months ago out back so i can stop looking like a little girl with my 245s haha. I want to get 315s out back and just run 245s up front. I was thinking about running nitto 555r's in 315 since they are even cheaper than the regular 555's, and will hook alot better. How long can i expect out of them? How good will they hook on the street compared to my stock 245s or even compared to the regular 555 in 315? My can is Not a dd and does not get driven all that much so im figuring if i can have more fun in my car on the street when i do drive it, it will be worth it. These tires will not be used for the track as i have different 15 inch radials for that. My last question is that I would want to run the regular 555 out front in the stock 245 size. Iv heard people say this is a no no mixing tire types like that and other people say its fine. Whats the real answer to that? And will it have any adverse handling effects?
Thanks,
Dan