Billnye...
A big welcome from a fellow Canuck!
I don't know Alan, but it seems that you may be comparing two very different trucks.
Alan's truck is quite sweet - manual turbo, a combo never sold in NA, DVD system, big lift, (not sure about the 20" rims?!), etc. If you've got the mechanical ability or some big $$, this could be a great truck. The challenge is this is a truck that no Toyota Canada mechanic will have ever seen, let alone worked on. There may also be some challenges in getting parts for a manual + the turbo. If this is a daily driver, you should probably be prepared for some serious down time
I've only know one guy that had a manual, turbo 60 and his seemed to need lots of tuning to keep it running well - YMMV.
The LX450 is obviously a stock motor, but the one you are looking at has had some mods. The good news is it will be easier to get parts and they mechanics will have had some (often limited) experience with the truck. One problem I've found is that some Canadian Toyota dealers are not willing to service the truck (they want you to use a Lexus Dealer - C$110/hr shop rate). If you know the guy that's selling this rig - it may be worth it.
An alternative is to just buy a stock LX450 and modify it yourself (this is what I did/am doing).
My bottom line is that if you can't affort to fly down and have a look/have a mechanic give it a big check-over, you probably can't afford the unique cost of owning a manual, turbo
Where are you located? I'm in Toronto. A few others on this list are in BC.
Cheers, Hugh