band saws

I lay down a piece of angle iron for a straight edge and use my dewalt angle grinder.
Straight as you want it to be.
I use walter cutoff wheels. Best on the planet. Bar none.
My ancient bandsaw is for square,angle and bar stock
Its repeatable,if i set my mind to it. As far as a jigsaw, i flip it upside down in my bench vise and lock the switch on.
1/8 metal cuts nice and is way easier to manage.
I do a fair amount of fab work, and finding efficient, and cheap ways to cut metal is part of making money.
Plasma-its a toy,and used as a last resort.