Go with a Kenwood! I did! They have isolated inputs, and the signal to noise ratio is 120db, so hiss is negligable. Mine is a KRC-387 tape tuner (why have a cd??) and it works extremely well. You have to buy a special cable that plugs into where the CD changer goes, and on the other end is a pair of RCA's for the input. It's the cheapest method, without compromising quality. Don't use a Pioneer, as the inputs aren't isolated and the hum is anoying (the bus adaptor method). I tried out all of the range (my mate owns a car stereo shop) and found the Kenny to be by far the best.
Just my findings!
Check it out here http://home.primus.com.au/bravo
Ozzie Ozzie Ozzie!
[This message has been edited by Bj (edited 11-15-2000).]