I have recently purchased the Race Technologhy Dash 2 after owning the DL1 data logger unit for some time, with some help of dumhead becasue i don't have the time ATM he is installing it into the car and wiring the associated sensors.
The thing i liked about the RT package is that you can log anything you want and with the display you can display split and running lap times as well as any sensor data. Along with this you can add in the video package and review everything with all the logged data, it uses a 20hz GPS sensor and is accurate within 1m and you can get it accurate to within 0.1m by running another program that uses the data from other sat's.
The dash is really easy to read and has some very bright LED's that are adjustable, it also has the indicators lights, park brake, oddometer that is non resetable as well as alternator and warning lights so is completly street legal if needed.
Great little units.
Matt