I've got a similar setup - lugged Bob Jackson with aheadset, bullhorns, deep black wheels, slr. I think it looks good and I can easily change bars, the bars and saddle are comfy and the wheels are tough as a tough thing.

You can see a (very incomplete) pic in post #2 here http://www.bikeforums.net/showthread.php?t=153098 and here http://photobucket.com/albums/c350/j...ikeCircus2.jpg In both photos I am the tall guy with flat cap.

But if you want a quill why not just sell your ahead stem and buy a quill on ebay? Won't cost very much compared to the cost of the frame and you can do the same with other parts if you want a vintage look. I would choose the stem you really want and get the frame made to go with that - other people's opinions shouldn't be your guide and I doubt you will buy many custom frames.