The 3.0-RC release of The Gimp is now 98% close to what I need from it. Its selections work better, and it has something akin to adjustment layers. I just still need the Selective Color adjustment layer feature that #Photoshop has, and to recognize adjustment layers when loading PSD files. If they could add those two, it'd be 100% for me. But even now, it's good enough for what I use it for (editing my scanned paintings).
The cat is our Minime.