Also, sizing for this frames:

5. On my redline, I wish I had more saddle setback (saddle rails in the furthest position), so maybe bended Thomson seatpost may help. Should I choose the size based on my current top horizontal dimension? I know it's a fit question, and you have special topic thread here, but 925 has weird dimensions.

[MENTION=25248]nightfly[/MENTION] - what Soma Rush size have you switched to from 925 in 54cm?