Depends entirely on your tastes really. I'm a big fan of Sunlight, and did one side of my Tron in Sunlight and the other in Ice Blue, and it really pops.
Sunlight is a nice compromise between cool and warm, as should be obvious.
To give an idea - here is a photo of my Addams when I was trying to decide on cool vs sunlight (I went with cool because it suits me more). As you can see, sunlight is a nice middle ground.
In danger of opening a can of worms here but I tend to think the only reason people are fans of warm is because of the misguided belief that it is the closest thing to incandescent. Whilst that is true, it assumes that the warm light of incandescent is what the original artists and designers intended, rather than being - as I believe - the only thing available at the time, for the lowest cost that Bally/Williams and co could get them for. There is artwork that really does not work with warm, but what choice did they have in the 90s?