Oipolloi has their sale on
I checked sizing on Inventory's site and on TBB: While they differ slightly, it appears that most/ all Bedfords are pretty much the same size. Inventory's measures correspond more to what I think is accurate when I measure mine (Though both are spot on in the all important p2p and shoulder, with TBB going a bit overboard on the shoulder by 0.5" and arms too long by ~1").
With that in mind, I am usually not the one to advice to size up this season as I find most everything is TTS and looks best that way. Sizing up can add too much bulk in the body and arms (Yes, even for EG). And, depending how tall you are, it can add a bit of body and arm length.
However, if @accordion is right and the HT indeed is smaller than the ripstop, I would call Gentry and ask for the crucial measurements (And how they measure), where they feel they differ and by how much. If both jackets turn out to be the same in your comparable key measures (which would be my assumption), I'd go TTS. If the HT is indeed, say 0.5" smaller, size up to XL.
Also, you have to consider how you personally like it: I don't think the Andover or Baker look good too big, but the Bedford actually can look good both ways: I happen to have an XL and L in olive ripstop. The XL is not a bad look at all, but the look reminds me somehow of an over coat/ shop coat and has quite some bulk in the body. I prefer the L, which still is in no way slim or tight, but clearly more fitted and with an overall length that I much prefer. (FYI, if it is helpful, I am 5'11", 185#, more of a gym bunny so p2p, shoulders and arm circumference are usually the showstoppers).
Hope that's helpful.
Thanks for the advice Mike and @accordion and sorry for the late reply. I've had a week or two away from SF as I've been crazy busy.
Ended up passing on the HB bedford for now, I'm heading to Tokyo in September so figured I'd save my pennies for the promising AW14 collection plus or minus whatever is left on sale from the summer collections... Can't wait to stock up at Nepenthes and EG Tokyo!
If you are a true 34.5" waist you definitely need an M. The draw string helps with any looseness. It will be tough to find an M though. Perhaps Europe? Not sure I understand what you mean with them being cooler if slightly bigger. They are cut with a loose fit. If you want to go even looser, there are plenty of alternatives out there (Workaday, orSlow - even in a ripstop fabric, etc.).