I've been using Winamp3 for a while now.
I've switched back to Winamp2 a couple times, but I keep coming back to 3 because it has feature that I can't give up now.
All it takes is the right components to make it kick ass
Here's the component for the J key that you wanted:
http://www.winamp.com/components3/de...onentId=132996
And I love this one - It's a hotkey component:
http://www.winamp.com/components3/de...onentId=118998