I use the dual band compressor, a Boss OC2 & a chorus pedal. I have no pedal board and they are just left on the stage so space is not a problem for me. The Ashdown is built very well and will survive on stage with no problems.
As for the UV light, reading Ashdowns blurb, it is so you can set the level correctly to ensure you are sending a good signal to your amp. In practice this doesn't make a lot of difference IMO. As other have said it it part of their trademark dersign and it does look quite cool.
The size could be smaller, but is similar to the Markbass range of pedals, possibly a bit bigger than them?