Hobbywing v3.1 is best for the price - really good speedo which is is noticeably better than the others in GT12. Any LRP/Nosram 1S speedo will be top in LMP12 - as the latest one is not 1S compatible, find a used Stock Spec or the Nosram Pearl.
For club racing any of the lower-cost ones will do the job. Core Pace versions are good, the Viper gets good reports and the second hand Hobbywing 120A 1S v2.1 is a great buy if you can find one. Perhaps the most interesting alternative is this...
http://www.hobbyking.com/hobbyking/s...arehouse_.html
...available from the UK warehouse.
You'll need the program card with any of these to set them up and with some you need a program downloaded to your PC and a USB connector to set them up for 'blinky' mode (zero timing). HTH
