Lincoln Pak 10 vs. Millermatic 135

I was just wondering which is a better welder. I bought a Lincoln Pak 10 a little while back but I'm going to have to get a regulator and gas bottle to get it to use shielding gas (its set for flux core wire). In the end the Lincoln is going to end up costing just as much as the Miller which just went on sale (gas and regulator and cart included) I was just weather the Miller is a better welder.

I have the Lincoln SP135T and its a great little machine. Runs a nice bead, good penetration and the cost was minimal.