I used a standard siphon feed cup gun I borrowed from work, similar to this style. Ours is a Binks model 18
http://www.northerntool.com/webapp/w...70_22130_22130
I'm not sure about the tip. Although I have'nt used one....I'm sure one of those HVLP (high volume low pressure) guns would probably work better. You will get a good feel for spraying with the primer, if you have any issues, no worries, it sands very easy like automotive primer.
You will also need to get some thinner for spraying and clean-up. Were you pleased with the price of that Devoe paint?........sounds pretty good to me.
Here's a thought for you. Get whatever white you want for the topsides, paint it. You should have enough paint left to take the remainder back to them and have them put a little color tint in it (yellow, blue, whatever) and spray some color on the hull if you want.