It definitely seems that for around $28000 that I can pick up a GU series 8 .. but there are also a number of ST Y61's for around £30000 that have satnav and a few other features .. albeit with a few more k's on the clock (around 130 000km's) .. is there any difference mechanically between the series 8 and the Y61's? Would it be worth me trying to push for the newer model or would $2000 saved buy me an aftermarket satnav to fit?