at the lab we have one of these too, we put a disc on there thats good for up to stainless steel, it makes the edges perfect on the steel, so after you cut it, you just finish the edge on there and its nice and square and flat.
708432K Jet JDS-12OS 12 Inch Disc Sander with Open Stand and DC
we also have one of these
414459 HVBS-7MW, 7 in. x 12 in. 3/4 HP 1-Phase Horizontal/Vertical Band Saw
which is awesome for cutting tubes and smaller pieces of plate, the hydraulic assist means you just sit there and wait till it cuts, plus it works as an upright bandsaw.
the plasma cutter we have is basically good for 1/8" or less, but ive gotten pretty good with it, i can cut bevels on thicker pieces and prep for joints that are to be welded.