@Imothph; You do want the F10 HUD, trust me. If not for the HUD itself, but for the beautiful full black panel dashboard display that comes with it. That alone makes the HUD worthwhile.
As for speed, the dash BC readout is good, or you may want to consider an Escort Passport 9500ix, as besides the obvious benefit it brings as a high-end Radar Detector, it also has a configuration option to display your speed in MPH.
- 2011 535i M-Sport (Born 10/10) - AW/BLK/DW - /ZMP (w/ARS, EDC, DHP, & AD) /ZPP /ZP2 (w/ZPS & ZPT) /ZCV (w/SCAD) /6FL /6VC
- Mods - 2TB SAT / 6WB MFID Cluster / 4U1 Ceramic Controls / 6NR BMW Apps / Rear Fog Lights / Cyba Double Layer Black Chrome Quad Tips