And I completely skipped over the part where you'd get a Premis at the same time. IIRC, those were some of the better Schwinns in the late 80's and early 90's and made out of Columbus Tenax.

Do some homework, but definitely choose whatever you'd ride the most. Just because one frame is supposedly better than the other and saves you a few ounces doesn't necessarily mean that you'll be happier with it.

For what it's worth, I'd keep the Bridgestone geared and upgrade the drivetrain.