I have purchased a nice, very clean 1990 Eldorado and will take delivery in a few days. I am wondering two things: 1) What are the BEST features of this model (from those who have experience with it)? and 2) What are some upgrades/additions I might consider to make the car even better? (I know the radio/sound system must be changed -- A/C is brand new and already converted -- paint is brand new.) Do you prefer the snowflake wheels? This car has the wire covers -- same as my 1988 DeVille. Thanks for your opinions and help!