Congrats!! I go to Performance Motorsport, most of us here do actually. They carry 19R, 25R, and 34R coolers. I went for the 19R personally for $600 (includes oil + filter change). When weather is 70F and less, oil temps do not go above 190-200F. When weather is in the 90s, it does not go above 220F. Remember, anything after 220F and the car begins to retard timing. 280 is limp mode.
Over stock, the 19R is 40F cooler all throughout. I frequently drove at 260F. So, in my opinion, if you don't track the car, the 19R is more than enough, especially for NYC climate. Come by this week to the meet if the weather holds up.
Congrats again, always a pleasure to see someone who's not full of hot air follow through on a purchase.
