Strathfieldsaye actually and originally caught the bug for toyotas with a 2tg powered KE20 (jap model). Used to tow a formula ford behind a 2.4l turbo diesel Hi Lux ok at 80 to 90 k struggles at 100 a little but will do it, petrol is similar but chews fuel when towing.
Personnally my current tow car is a 3.5l pajero but price is a lot higher than your price range.
200000k is pretty low kays for vehicles of that age, so basically would come down to personal preference on ergonomics etc, although I would probably go for the surf.