I suppose at the end of the day money talks, and HQ Sandmans are the ones pulling the most money! I think Innuendo nailed it - HJ and HX fans are voting for HZ.

Taking into account all the factors around them all, and given how people seem to value them the one i'd choose if it ever turned up in the condition I was happy with would be a HJ Kingswood XX7 or XU3 in L31 M41. Yes i'd rather the HQ variety but the HJ would be significantly cheaper and have a better engine and box.