Thanks for the feedback so far!

Sorry I forgot to mention the frame--it's the Civia Hyland (http://civiacycles.com/bikes/hyland/hyland_frame/#build)

It seems like it's already a fairly "long" bike, so the top tube (effective) even at the 52 cm frame size is a relatively large 550 mm. This is pretty comparable to top tube length in some of the otherwise larger frames I've been considering.

The reason I'm leaning towards the Hyland frame is because it has sliding dropouts that will let me put an IGH on it in addition to having mounts for pretty much anything I can think of. There aren't a ton of other frames out there (that I've found anyways) that have drop-outs that are good for an IGH and that also allow mounting of racks, fenders, disc brakes, etc. Another frame that I was considering was the Cotic Roadrat, which is a bit more expensive (plus I'd have to import to the US from the UK, which I'd imagine is a hassle).