do note that the range is is in the same league as the cruiser,.. but don't forget that at this mileage the rangerover is going to start giving minor problems which will eventually end up as major issues if not rectified immediately. also note that reangerover parts are unrealistically expensive when compared to toyota parts.
if i was in your place and have a fully reliabel prado i'd probably stick with it since by making the swap to a range might make you miserable,.. but it might not.
it's a tough decision and as i said before, go for the one you prefer to have in your dirveway.