Thank you for the clarification as to which units can use custom maps. Given this information, I guess I'm looking at the eTrex20, eTrex30 or Oregon 450 as the affordable (for me) choices. When I read their reviews on Amazon, there are an alarming number of negative reviews claiming poor accuracy for all 3 units and difficulty reading the screen for the 450. The 450 also gets a number of bad reviews on GPS City, the eTrex 20 and 30 not so much but they're so new there aren't many reviews for them.
Yet, along with these bad reviews that appear to show a pattern of flaws, there are many glowing reviews from satisfied customers. Are the bad reviews just a case of lemons? Is Garmin's quality control so poor that there is a significant percentage of flawed units being sold? Are they, like everything else, being produced in China?
It looks to me like the return service of the place you purchase your unit needs to be the primary criterion, not price, for where you buy. How do Amazon and GPS City stack up in this regard? It appears that Garmin will be little help if you get a lemon based on an overwhelming number of people posting bad experiences with their customer support.