I'm 5'10 or 179cm and like a 460 to 465 reach. My Rail was always a bit short for me (452-457 depending on flipchip), but the next size up was an ungodly 490+. From intial setup I've had the seat slammed as far back as it goes and bars twisted as far forward as they go for length.
I finally got around to swapping the Bontrager 45mm stem to a new raceface 60mm & I moved my seat forward 5mm so can't wait to go for a ride and see how the length feels. 10mm is quite a decent jump and should land me around 462+/-