Regarding the timers, the racechrono system, from our friends over in 'superbike racing land', are great value and have very good data analysis capability. they also map any track very easily.
These people make the software for phones too-->
http://www.racechrono.com
I run this device - it all comes as one loaded pack here---->
http://racechrono.com.au One great thing about this set up, is it works very well with gloves on.
Most of my fellow racers have it too now, and we all sit around and debrief after sessions. You really find speed all over the place using it.
Good luck with it.
