I'll give the Voyageur another vote. I just purchased the Voyageur's brother (though perhaps from a different part of the world), a Passage. Your parts list looks quite simular to mine, though I'm going to have to hold off for a few months on purchasing the Brooks, and I've decided to give Kelly Takeoff's a try vs barcons.

As far as the claw hanger, I have one of the Barracuda Mk.I. Works well enough for a 7speed 27" wheel and a friction shifting setup. I've heard of a couple of other BF members using them with indexed shifting as well with satisfactory results.

On the Voyageur, which cable stops are you talking about that it lacks? If its the rear stop of the casing before it runs down to the brake then I believe Nashbar and loosescrews both sell a cable stop that attaches to the seatpost binder bolt. I also may have one around that came off my 1980 Schwinn Traveler if you'd be interested in trying that one. In any case, that shouldn't be much of an issue to resolve with the Schwinn.

One last word on the voyageur is that the stem quill needed may be the smaller diameter often found in Schwinn's. (Exact size #'s escape me atm) Nothing that would keep me from using the Schwinn, but something to consider at the same time. Looking forward to seeing your finished build, I hope to have mine Schwinn tourer back on the road soon.

P.S. - if you're looking for a cheap but good 27" tires, Nashbar has the IRC DuroWinner II's down to like 12.XX each in 27x1 1/4" and 27x1 1/8" sizes. I've got a pair of the 1/8's" on the Barracuda and got the wider size for the Passage.