I've always regretted not getting an acoustic/electric, and I just realized today that they make acoustic pickups that you just pop in the sound hole. I have an Alvarez RD8 which is pretty low end but its decent, but I don't want to spend too much money on a pickup because my guitars not that great and I'll be playing it through an electric guitar amp(Vox AD30VT with eminence speaker)

So any suggestions on a cheap acoustic pickup? I'm going to sam ash in a couple days