Stealing decks...hmm wheredid I read about that before .. stealing decks?? aaah yeah now I remember, it was in one of those "how do I stop my players from looting all the time?" threads. I believe most of the answers were something along the lines of " .. trace the loot and punish them!!" or " give them so much notoriety, that they might as well retire " etc.
My point is, if it turns out the GM is not ok with this sort of behaviour. Your decker might be in bigger troubles than having an outdated deck.
Talk with your GM, maybe he is willing to make a run where you were to meet your nemesis decker, you get to hate each other for a few runs until in the end you defeat him and yank his deck.
Another alternative: there is 130K difference between the renraku and sony deck. The sony has a higher device rating, 3 increased stats and is able to run an extra program. For every 30K you can upgrade 1 stat by 1, until after 150K it has the same stats as the sony.
But yeah, it does sound like you need to find a better fixer with better paying runs.
