First post here...been reading and learning A LOT and when I saw this I thought I would add my 2cents since it is something I have experience with:
I had a PACT MKIV timer/Chrono and sold it to buy the
CED M2 and could not be any happier. This Chrono NEVER misses a reading and is very forgiving about light conditions. I also have the IR setup for it but have found that unless it is getting REALLY dark/overcast there is just no need for it...I don't chrono much in the dark:p
It is a very well made unit and I also recomend the storage bag made for the machine. Best price I found was here:
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