Using a prop to set country value should work fine. You may also use evars with expiration of hits. The problem mostly people face using evars is when the expiration is set to visit an visitors change the country mid visit. I do not think using props will limit any reporting capabilities, except for the fact that it has a limitation of 100 characters.

Actually, this is caused by a common "gotcha" in AA: although "pagename" is tracked with Custom/Download/Exit Links, AA doesn't actually allow Page and Custom/Download/Exit Links to be reported together!So the solution is:Setup an eVar to track the same value as your Page. A simple way to do this is to set the eVar to "D=pagename". AA will then copy the value from Page into your eVar when it processes the hit.Now in your report, use that eVar instead of the Page dimension.