Well starting off with the Vigo thing, well the only difference in the Vigos are that they've got the hideous "bling" and the later ones have the VGS Turbo
The Vigo is the Thailand version. The HL2.HL3,Invincible are the UK variants.
If the UK versions were properly maintained there is no rust issue, they have a special undercoat periodically done to cope up with the salt spray used during winter, besides the Navaras have the severe rust issues..
Apparently the 3l is a tad bit powerful but reviews say they have a severe injector failure issue (reference http://en.wikipedia....oyota_KD_engine)
Have not heard this issue in SL anyway
2.5l almost bullet proof, mind you it is not that economical if you are heavy footed, besides I feel super diesel is mandatory..
Manual, my preference, allows you to harness the output properly
The heavy vehicle issue came with some two door versions and smart cabs (two door+ the smaller doors)
Double cabs have the dual purpose registration
Luxury tax? it has the semi luxury tax; starting off with 50,000 and halving every year..