Good idea on buying the Aerobars now... It takes a couple of rides to get a feel for the steering, it's pretty twitchy at first, but you soon get used to it.

I bought the Profile Design Aerolites, as I lost weight I could move the bars out some (5 mm) to get in a better aero position ( since my gut wasn't in the way anymore). :)

After an entire season of using the bars, I'm either in the aero position, or I'm out on the bar ends getting on the brakes.

Now, don't try riding on them on rollers at first, especially if you are in a room full of sharp edges and your wifes' knick-knacks. I suggest a good empty parking lot instead.

I ride with the Syntace C2, as do a few of my friends and family:
http://www.trifuel.com/gear/product/237.php

On the long rides, I think having the aerobars is better. More options for your positioning so you don't get sore shoulders or neck from being on the handle bars or the drops all day. If I get tired I just rest on the bars, or have my hands on the pads if I need to sit more upright for a stretch (only recommended on flat/no traffic areas, I have popped off them and endoed :().

don't ride in a pace line using your areo bars unless you are pulling. Last summer we had a horrible accident where a person in the middle was on their areo bars and coudn't get to their brakes quick enough to avoid the sudden slowing of the cyclist (me) in front of him (avoiding dead animal at the last moment).....very very bad accident happened. Carbon fibre bike actually broke in half, along with many bones.