I sprayed. I thinned a bit with xylene. prep is a total pain, but I compared the finished look between rolling with a good roller and the sprayed finish looks much better in my opinion. I used a HVLP (high volume low pressure) sprayer, but I saw a guy use a wagner type electric sprayer on youtube. my wagner says water based paints only but I am not sure how one of those would do. luckily you have 3 weeks to research it!
We rolled ours with mini rollers and Sherwin Williams paint and primer. Got it all done for less then 500. We are pleased with the results and it seems to be holding up well!! Preparation is the main ingredient to a good looking job!!