My Godfather has a good setup.

Equipment:
Heavy Bag
Speedball
Floor-To-Ceiling Bag
Adjustable Bench
Multi-Purpose Stand (Chinups, Dips, Knee Lifts, Pullups)
Treadmill
Water-Resistant Rower
Pec Deck
Weights Rack
Barbell
Dumbells
Curl Bar
Mat Area
Skipping Rope
Ankle/Wrists Weights

Accessories:
TV
DVD Player
Stereo System
Towel Rack
Mirrors
Bar Fridge
Sports Timer

I think I got it all right. Not saying you need all of this. My Godfather is a Real Estate Mogul and has too much money to spend. His gym was advised and setup by a sports company.
If I had the money I'd get pretty much the same stuff. So this is just an idea for what other stuff you might like.