Which OBDII interface are people using to monitor their cars vitals? (And maybe clear out a CEL) I have 2001 Tiburon with the CEL option pack

. I found one for like 88$ us. Is this a reasonable price, I saw some posts on other forums stating that all obdii's are not created equal in the respect that the info collected is dependant on the obdii connector.
Thanks for your help.
P.S. This is the link i found
http://obddiagnostics.com/order.html