Just joined the club about a month ago and am really loving the game. Great theme, the call outs are funny and shooting goals is just plain fun, although I am constantly amazed at how good that goalie is.
It already had led's in the playfield when I got it, so all I have done so far is change out the back box bulbs to led's (cool white frosted mainly with a few purple and warm whites) and added the "WCS - Lighting Extras LED Kit" from Pinballbulbs. The kit was really easy to install and required no soldering as everything was plug and play. It comes with two led strips (for the top and bottom) and two double spotlight kits that mount on the slings. Plus, they threw a speaker grill template in the box as a bonus.
I am still playing around with aiming the spotlights for best effect, but I have to say that the kit has made a huge difference at getting rid of the dark areas just above the flippers and in the top left corner and really added a lot of visual pop to the game. I think it is one of the best bang for the buck mods I have bought.