q45 is kind of the in between the stock and the z32.. they are 2 piston calipers... usually a lot cheaper... and if you're 5 lug, should be a straight bolt up. (I think)

many people see the z32 swap as over kill, especially given that most of the time, the swap costs several hundred bucks.
(always check the prices for "new" parts at the part's stores... you can get both front calipers, reman'ed from advance for cheaper than most people will sell them used)