I can recommend the Sigma 1609. SMS (= wireless) in any case. I find it better than any Cat Eyes. Why not invest that minimal extra dough on a wireless?

The 1609 (SMS) has everything I need and practically nothing I don't need.
What the 1609 has, but the 1600 does not have:

- Cadence (= r.p.m.)
- Stopwatch
- Use on 2 bikes
- Temperature
- Light (background light in the display with on/off)

Only disadvange IMO: the instruction booklet (= user handbook download) is a catastrophe, but what the heck.

Mike