John,
I'm not to thrilled with the unit you provided a link to. It has very poor reviews. I think you need to be closer to the $100 range.
Here's are few recommendations. Also, don't be afraid of eBay to find a good used unit.
1st choice: Yaesu YS-500, These are old, out of production units, but very reliable and accurate. I own two of these meters (one which travels and one which stays at the shop. Both are over 20yrs old.) Here is a link to a used one for sale.
For Sale - VHF SWR/Power Meter & Pre-Amps
(If I need a meter, I would jump on this now.)
2nd choice: Diamond SX-400, Used units show up on ebay regularly. Note: These units are outfitted with an "N" connector requiring you to purchase adapters to go from the "N" connectors on the meter to the PL259 (UHF) connectors found on almost all of the radios used in off-road.
3rd choice: Avair AV-601, These units are a copy of the Diamond SX-400 and use the same "N": style connector which will require the adapters. I'm not sure if the quality is as good, but they do look identical.