I need to get a decent straightedge to align my jointer, table saw, and planer. I'm sure there will be other uses as well but those are the immediate needs. I'm figuring longer is better so 4' or better is what I've looked at. I know that Lee Valley has a 50" aluminum version for $80 which isn't totally outrageous but I figured I'd call on the collective wisdom of the masses for guidance.
Here's a link to the LV one I found.
My other question is can I make do with the 38" version, at half the price it's pretty attractive but as I'd hate to feel like I wasted money on something that's just not quite long enough.