I travel a lot - 4 days a week, at least 2 flight each week and I use my laptop bag extensively.

I usually carry 2 laptops, 1 work (heavy, ugly, Dell 15.4") and an ultrabook (Dell XPS 13). The bag usually has some of my travel accessories - power adapter, Kindle, pens, couple of note books, medicines.

My current laptop bag is a Kensington and it's beginning to wear, and I need a recommendation for a good laptop bag which

- fits well on domestic and international overheads / underseat
- is TSA friendly, hate having to remove laptops every time
- spacious
- comfortable shoulder strap, current one hurts
- looks professional, leather may be a good option if you think so

Recommendations, sites, outlets etc. all appreciated.

Thank you,