I believe this is the reason many people find a 60cc saw kinda confuses things when you're trying to make a versatile lineup. It's not really light enough to be a nimble limbing/thinning kinda saw (like a 50cc is), and it doesn't have the AV/oiler to run a long bar very well, even if it can pull it.
If you didn't have the 362, it'd be pretty easy to go with a 70-80cc saw. They'll all handle a pretty long bar, and if you get bored with it stock, have it ported and it'll make you smile again. But as you point out, they're not THAT different (in stock form) from a ported 362 in terms of power. So that pushes you into a bigger saw to go on top of your lineup.
Personally I like my ported 036 a lot. But for most of the work I do, it's a stock or ported 50cc and a stock 70cc. That's plenty of power, and not a huge honking saw. I've never owned a 390, so maybe it'd be more comfy, but my 395 is big enough that I just don't grab it a lot for general firewood duty.
For cutting firewood, I use a 16" 3/8 bar on a 346 a lot. Right now, that's how my 036 is set up, but with an 8 pin. It's fun, light, and powerful. But I think it's better suited to that, than it is to being put to work with a 28".