It should handle the editor just fine. I upgraded from a similar system a couple years ago and it was holding its own. It will probably chug for a bit any time you need to compile a large number of shaders, though, which is ultimately what got me to upgrade.

I dislike the new toolbars. Not a resistance to change thing, they are just so much less readable IMO.

This has bothered me for so long. Hope this gets merged.