I like the look of some of these (Nagasawa etc) but are they reallly as special as some of the blurb on the Internet appears to suggest? I'd be using it on the road - with drilled fork - but am wondering what they're like to ride. Are they heavy? They're fairly expensive compared with a lot of other hand-made steel frames. I assume they're made with a lot of attention to detail, and finished accurately, but not sure if that would make a noticeable difference to the ride.