In cold weather both my Fantom and Triton don't feel like turning the LCD on for a while. The Triton once took 10 minutes and the Fantom could be 3-5 minutes with half brightness. Annoying when you are in the mood.
Silver Dragon Sound is quite right, the preset sounds are fantasic but only because they are skillfully programmed. When you change a few parameters the magic fades and you have to remember you can only play one stereo sample in a program not 4 stereo layers on the Fantom. This is why combos are so important on a Korg. Layered performances on a Fantom are not so important.
If you can stand the load time of samples from CF, I would suggest you build a quality multsample library of your own on the Fantom. That is true with any of the workstations. BUT you are up for a considerable wait every time you turn it on.
"The grass is always greener" applies to keyboards. You will always think some other workstation is better, but you will be surprised over the simplest things which the others don't do as well. Buy every workstation out there so you know what I mean
Cheers,
B