Diagnostic reader

Team,
Could someone recommend me which OBD scanner to purchase. Would like to be able to diagnose OBD1 and 2.

Thanks!

Here's the one I purchased:
http://www.amazon.com/gp/product/B000KG8KB0

I have used it 4 or 5 times and it does its job.

AFAIK, You can't use a scanner for OBDI vehicles.

Thanks for the link and info. I was thinking of this setup and wondering if anyone have tried it.

DashDyno SPD ProPack