I'd put it towards the LED lights. I think that they are sharp looking, and you can't go wrong with the visibility factor.
I have, since reading this forum, been curious about the oil cooler. Naturally I want to do whats right for my bike but I am not so sure if it does add longevity to the engine. Especially if you are stage 1. If you read TheTank's post, he lives in Phoenix and he's never had the need for one. Phoenix! Tell me it doesn't get hot down there! So maybe I will rethink my oil cooler add on. Unless there is clear, irrefutable data supporting better engine life using an oil cooler I'd save my $$$ and put it towards the LED's.