Im going for the obdlink device which is one of those tools you can hook up to a laptop. Reviews are a bit mixed but ill let u know once iv received it how good it is or not.
Apparently these devices are already a hit in america and have been but hasnt kicked of here just yet.
Iv been looking at the OBDPRO which is supposed to be the best but I think im going for a middle ground with the obdlink than take it from there.
It will be good to here from anyone who has already tried one of these devices.