Even if you go with SM2, you will want Blaster Law, Robotics Manual, Equipment Manuel, etc from the SM:P line. Everything in them is easily adjusted to the old system.
I did an Issac Asimov salute game were everyone in the party was an Android. Was a total blast. Since every player bought the high end "back up drives" for their droid, even after vaporizing a few, they were right back in game (and with less ability at first because they needed more cash to buy "upgrades" with). It was one of the wilder games I ever ran. The players took full advantage of their droid nature, even being willing to mutilate themselves because everything is replaceable (just hope that d100 roll ain't 00 or the back up fails, bwahaha). When Drano rolled a 97 on his recovery, I made him lose a few skills and suffer "glitches" for a while, until his new systems fully intergrated with his OS. This resulted with some negatives to activity and a few well placed "I'm sorry Drano, but access is denied to those systems because of a glitch in your OS. You repair program predicts 3-5 days till recovery."