So what is the real advantage of the remote reservoirs? Is the advantage only when cycling the shock rapidly, or are there some other benefits for having the larger reservoir? If all you're doing is rock crawling with maybe some minor dirt road riding between, are the remote ress a bit of overkill? I'm also looking to upgrade my coils/shocks so that I get a lot more travel for crawling and was wondering what the best way to go - within my budget. It looks like you could get the Fox shocks with remote reservoirs for about $750, the Kings w/o reservoirs for about $950 and the Kings with remote reservoirs for about $1300. At $950, the Kings are still pretty much up there, but, as was mentioned before, you do get what you pay for - I'm just trying to understand what that is.
If all you do is rock crawl and a bit of dirt road riding, yes, reservoirs are overkill. Their benefit is that you'll have a larger capacity of oil and having it go to a remote reservoir will help keep it cool. This will help to prevent cavitation and performing as designed longer under extreme conditions.