I have a project stalled (skipped over to a Rohloff) with the rear freewheel config you have in mind. I bought several 7 speed FWs and I am not too sure on the quality, they certainly were fairly inexpensive. I think this is a good option for people who want 40 spokes or more without spending 500 on hubs.
About the only thing I didn't like about the project, and I still am going to finish it, is that I really couldn't convince myself that the cartridge bearings were superior. Phil hubs make sense, the hard axle, the quality overall, whether the cartridges are really a good idea is harder to say. I started to think of the Hugli, but they are about 100 more, though you get a freehub for that. I think that by droping the smallest cog on an 8 you get a similar useable coverage with the 7. However back in the day they packed those gears differently with a mega low, so you have to consider that also.
I got jumped on, by the way, on the touring forum, for calling that spoke style "dishless". It isn't dishless, it just uses similar length spokes. You can set it up so the whole bike uses one spoke length.