Large tires for ice and snow is not a concern, all we get is rain. Lots and lots of rain.

So i wont need studs or wide snow tires. I just need tires to do an hour worth of city street driving. Are 25's fine ? Or will i need wider for comfort and flat protection ?

Discs, i'm almost sold on them, i live in a rain forest in mountains. Steep 10-20% grades, pouring rain, morning rush hour, blind drivers = disc brakes.

The bottom bracket height, chainstay length, and wheelbase along with the wheel sizes are still my concern as to which would prove the best for commuting.

Do i want shorter wheelbase/chainstays with a higher bb and 32's or do i want the long wheelbase low bb with 25's ? Thats where im confused as to which advantages one has over the other and which disadvantages.