Opinions on simple in car lap timers

I am already thinking about next season and would like to add a laptimer to the cockpit.
There seems to be a reasonable amount of choices abeit in different price ranges and ways of solving the problem.
My first inclination is to get the AIM solo with GPS at $400.00
However research on Ebay and Amazon has located several other options with lessor price points
They fall into the categories of GPS, transponder/infrared combos and straight infared.

GPS

GPX Zed
Aim solo
Tutor GPS
Sumomoto Cheetah
Pitking Products

transponder/infrared hybred

Raceceiver Lap ALT 100

Infrared

Best laps
XT racing
Sumomoto
Longacre

I only have 2 requirements.
One is that the display has large numbers readable in bright sun.
The other that it gives some sort of indication of fastest lap.

Let me know if you have experience with any of these products or can offer suggestions not listed.

Thanks in advance

Opinions on simple in car lap timers