Thanks for all the replies. I think I'm gonna go with the 17" now. I'm already used to the weight, I guess I'll get used to the footprint(which really is only about an inch bigger on both dimensions). Whenever I think about getting a 15", I just remember to look at this picture:
I've noticed, that when both units are off(or closed, for that matter), the size difference really isn't that big...however, when both screens are on, the 17" just looks gigantic next to the 15"...and I realized that's simply because of the sheer resolution of the 17" combined with the fact that the black bezel is thinner.
Thanks guys. Gonna place my order for a 17" later today!

I've noticed, that when both units are off(or closed, for that matter), the size difference really isn't that big...however, when both screens are on, the 17" just looks gigantic next to the 15"...and I realized that's simply because of the sheer resolution of the 17" combined with the fact that the black bezel is thinner.
Thanks guys. Gonna place my order for a 17" later today!