Congrats on the beautiful bike! From where you live and ride, and given your current level of fitness, I would recommend the triple. I have ridden both, and while I currently have compact doubles on both my bikes, I have had to pair them with a mountain cassette and derailleur in back to get up everything I want. and then I feel at times the gears are further apart than I'd like. A compact double is easier to keep in tune, but if I had it to do over I would get a triple. As you get stronger, you can always go to a tighter casette in back and/or just use the granny for emergencies.

p.s. I agree with the recommendation to do it now while the cost is minimal. Doing it later will cost you a lot!