I can't comment on Tumi as I have not procured one.

I have both B&R and Travelpro. B&R is good quality and fantastic warranty, as some other have said, they are what Travelpro used to be and perhaps even more. The one downside with the carry on B&R is the outsider handles -- this does reduce the amount of packing space versus an internal handles bag. I personally like the flat packing but you may have space issues. Their 20 inch bags still have a suiter compartment. The zippers on the B&R to me are superior to Travelpro.

Travelpro Crew 8 is a decent product, I wouldn't go so far to say that it is "cheap" quality, just not in the same vein as their earlier stuff. With each sequential Crew series, the weight has decreased (most likely due to market demand with more stringent carry on regs), but so has the quality. However, at 40% to 50% of B&Rs price, I think it is still decent. Please note that TP's 20 inch bags for Crew 8 are either widebody or have a "business" organizer in the standard (which sounds like you would not use). Neither have a suiter compartment. You may want to look at their Platinum series, which is supposed to be a step up from Crew (I've never owned one of those so can't comment further or verify).

An alternative you may or may not want to consider is getting a roller briefcase for your 2 computers and a shoulder bag (Red Oxx or Tom Bihn, etc.) that can rest on the briefcase roller. Since you are going for 3 days, you should be able to find a good shoulder bag to easily hold all these items. A few of the benefits are fewer hassles with gate checking (shoulder bags hardly ever are in my experience), and you can use the roller during the week to lug the 2 computers. There are a few threads within the forum on this if you're interested. Best of luck!