The first edition of Shadowrun is worth reading. It's got all the jank mechanics, but the world is being laid down for the first time and its far more of a passion project than anything later. The first edition - like many new games from small publishers - was built on a hope and a prayer, not corporate logistics and attempts to appease the maximum audience. And of course, 1e doesn't suffer from metaplot canon bloat.
Every edition of SR has wankass mechanics (more or less in various editions depending on what's important to you), so if you like the setting, I'd highly consider porting it over to D6 system. D6 isn't a sexy system, but its blandness doesn't matter if you value something that's easy to use, reliable and mostly fades into the background during actual play. The PCs are at the similiar level of toughness in both systems.
There are so many D6 support PDFs out there now that your conversion would be done in a weekend.
Or just play SR with its wankass mechanics.