VMC - Buy or Build? With Ramblings ;-)

[magicniner]

These are general questions to everyone, not just you Magic.?

#1 What travels would consider ideal.? . . . In X, Y & Z
#2 What's more important to you Bed size or Travel.? (Consider often you'll see 3ft+ tables with one or two 6" vices taking up only 18" space.)
#3 What would prefer to use Vice or Fixture plate.?
#4 What material cutting ability is most important Steel or Aluminium.?
#5 What's an ideal footprint.
#6 Bench mounted or Freestanding..?
#7 Fully Enclosed or Open.?

#1 X 800mm x Y 400mm x Z 500mm would be nice (has to have space for a decent 4th)
#2 I'll use all the travel I have, more is better, floor space limitations
#3 I can live with fixture plates, you can have one with vice mountings ;-)
#4 Sadly both Steel and Aluminium are a requirement, I have no objection to a belt/pulley change
#5 10' wide, 6' high and 5' deep would be in the ball park, could go 12' wide and 6' 6" deep
#6 Free standing
#7 Enclosure, flood needs to be an option