This topic comes up from time to time. It's personal preference. I've had a 2wd truck, as the other poster said and many times wished it was 4wd. But never the other way around. I have spun in 2wd trying to back a tt up into a site at a state park. Loose Gravel site, up an incline. Kicked her into 4wd and she walked it right up. If i can afford it, I'll never own a 2wd truck again, period.
Op, it sounds to me like your mind was made up from the beginning. Good luck. You need to buy what you want and that's the most important thing.