This really depends what your style of playing is, and how you change your sound through a song. If you are using the Axe to simulate one amp, with no effects at all, then you don't even need a floorboard. Being in a covers band I'm often switching between several guitar parts in one song. For many songs I'll have rhythm and lead sounds, plus a mid boost to raise the sound a little between vocal lines, and maybe a light chorus effect for a different sound in the middle eight. Then there are songs which have their own effects: tremolo, univibe, phaser, which cut it and out at different points. The floor board rapidly becomes part of your instrument, just as the stops are on an organ.
I've had an Ultra for a couple of weeks. Yes, the sounds are very good, but exploring them is almost a distraction. Most of my effort has gone into setting it up for ease of switching on stage. Choice of floorboard is eventually going to be crucial. Like Dutch, I use and FCB1010, set up with 5 patch and 5 stomp pedals. Already I'm wondering whether it will give the ease of use that I need.