I want to buy a set of four panniers for touring. I want to use the front ones on the rear for commuting. I'm thinking probably Ortlieb.

I have to carry a 15" widescreen laptop to work everyday. My current cheap panniers work fine for this, but will this laptop (in a small sleeve) fit in the Sport Packer or Front Roller panniers?

I'm having trouble picturing the size of these things.

I do plan on ordering the Back Rollers, but those would only be for touring or carrying more stuff (shopping?). I'd like to carry the smallest pannier I can for commuting.

Thoughts?