Looking at getting a used M3 Carbine 112 combo ($700 shipped) -OR- Used or new PF500/PF115 combo. The 500/115 combo is selling for $800 new...I think I can find a coupon code to get it below (or right at) $700. I think the only con to the Mesa is the weight Cons on the Ampeg are the PF500. I have read the 500 has had a few issues Styles of music vary.....using a passive Lakland JOBO4 strung with flats equipped with Nordy Big Singles. Might switch to nickels, but for now flats. Which rig and why?