Mac System 7 is probably no good - the modern web is largely unintelligable to the contemporary browsers. I had a Mac Plus for a while hooked up to a Gatorbox

Mac System 7 is probably no good - the modern web is largely unintelligable to the contemporary browsers. I had a Mac Plus for a while hooked up to a Gatorbox that had internet access, and the version of Netscape(?) on there couldn't even load the Google home page. The Amiga guys are pretty fanatical, might be worth investigating that. Old Sun workstations are too feeble to run a modern web browser. Never had an SGI (always wanted one) but again has a devoted fan base. I think if you need modern but want retro, configure a Linux with the Motif Window Manager and enjoy that CDE, post Unix wars goodness while still being able to run a bit of modern stuff.