[QUOTE=mishathepenguin;20890020]

...The frame is slightly too large (TT is *right* there when standing over) but I manage well pedaling with 170mm cranks...

I had this issue (top tube height only) when I got older. I was OK with it for quite a while. I did not have the reach problem, though, and my setup has always been with the saddle and bars at the same height.

If I wanted to keep the bike, I would consider swept back bars (mustache, etc.) as second poster suggests, or a swept back bar mounted upside down to get a bit of drop. Another alterntive might be the randonneur type bar which would allow keeping your current brake levers.. Good sources of swept back bars or randonneur bars would be from Rivendell, Rene Herse or VelOrange, as well as Soma, Salsa, Surly, ands some of the various newer gravel bars. Keep in mind the Nitto stem "may" be a hard match due to sizing of handlebar clamp which is I believe is often 26mm. There are adapters if you have a 26mm clamp and a 1" bar, but not vice versa. Rivendell has Nitto 26mm swept back bars and also the Nitto Tallux quill stem which allows a higher mount of drop (or other) bars.

If you want to save costs while experimenting, a threadless stem adapter (one inch guill to 1 1/8 inch upper) would allow you to get a threadless stem that takes a more common handlebar diameters. I love the threadless stems as you do not have to unwrap the bars and remove brake levers to swap stem length or bar set for static test fittings.