I'll check it out in person, but the MEC Shuttle is on the small side if you multiply out the numbers.
I really would like something that approaches 40L (the Aeronaut does).
I wish there were a Briggs and Riley bag in this category. Evex here near Toronto has great deals on BR stuff and they are a repair depot as well.
The MEI Executive Overnight sounds the best but they've got delivery issues (not that I'm in a rush but they do sound rather flaky).