I recently bought a Polar Heart Rate Monitor/Cycle Computer to guage the intensity of my cycling workouts. Is your husband interested in monitoring his heart rate or more interested in the cycle computer functions?
I had a bad experience earlier buying an inexpensive (cheap) heart rate monitor (HRM), and a friend recommended Polar products. The Polar S150 is a wireless HRM but is wired for the cycle computing functions. I have been very happy with its performance so far (three workouts) - it fits within your price range (although mine fell below because I got it on sale) and my local bike shop helped me with the installation.
The trade off between a combination HRM/cycle computer and a pure cycle computer (at this price range, I believe), is having the computer provide a Cadence for you versus using an internal cadence (exerting your heart into its training range).
Although your husband might not want a HRM/computer, I hope this information helps you with your search.
2009 Cycling Goal: 2,750 miles (3,500 miles 8/15)
Year to 10/2: 3,255 miles
2008 2,500 mi/2,419.1 logged (80.9 miles short)
2007 (1/2 Year): 1,000 mi/ 1,002 logged!!
| current weight: 210.0