In reply to Chris_V:
I'm not sure quite what you guys are imagining. My understanding is that 60% of the roads I plan to travel are paved. If i take side roads, they are considered "bumpy" so I would need more ground clearance, but not necessarily in the off-road truck range. These may be gravel, mud, sand or anything in between. Most locals don't necessarily drive 4x4 trucks, although I'm sure most would like to. A jacked up road car would have plenty of clearance. I like that rally merc very much!
How comfortable would you be with a loaded hilux, +4 people for 15 000 miles? How about the all important fuel economy?
As for rust, yeah, I'm Canadian, I live in the stuff, everything I own or have ever owned has rust. In terms of the land rovers I saw being rust buckets, well, I mean structurally unsound rust buckets, not the "has patina" kind of rust bucket.
As for safety in Columbia and such: I'm still at the planning stage. I have a few contacts locally who may be willing to help me out/guide me through. There are few countries where safety is a bigger concern, like guatemala, or Columbia. Nothing that can't be overcome, it has been done before and can be done again. I've travelled to far eastern Russia and Mongolia before and I've heard a lot of horror stories from there too. I'm not going to be stupid about it, and will plan/research this thoroughly. Thank you for your concern, twolittlebroncos. I would be interested in any insights you may care to share with me.