That is a lovely range of gears. Good for going up hills with a loaded bike, and good for cruising at a nice pace with an unloaded bike on the flat.

It's easier to change chainrings and cassettes than you might think. I've done it on two of my bikes, it's no big deal and if you can't do the wrenching yourself it's not too expensive, either.

Take the stock (it's a very nice range) and ride it lots. Maybe you'll even ride the drivetrain to bits like Bikerhen did with her Surly LHT. (she did several thousand miles on it before that happened). You'll get a feel for how you like to ride, and maybe you'll want to tweak your gearing a bit a while later. It's simple to do. (cost me about $20 to pop a smaller chainring on my Surly CC, and that includes the cost of the ring)