Thanks to everyone who replied, while it turned into a ported vs stock thread that wasn't my intention. I just wanted to go into the world of ported saws with an open mind.
After starting this thread a Wicked work saws husky 385 pretty much fell in my lap at a fair price, direct from Terry.
It is a very impressive saw, then I got to run a stock 390 and 395 on the same day. I hadn't wanted to post until I at least had a good few jobs under its belt - but I had quickly figured it was something a bit special when I first tuned it. I went to a mates place and started into some big, dry oak. Then moved onto some real old, dry redgum. I swear it didn't notice the difference!
Everything positive in this thread was made very clear when I got to use the two stock saws. The 385 ate both for breakfast. If it used fuel a bit faster, or was a bit noisier then I didn't care. A saw that size makes me need a break before it runs out of fuel anyway!
Its done a few storm cleanup jobs, and I truly believe I'm getting the work done MUCH quicker. The last one was 6 big stringybarks, all 2' across, all across tracks in steep country, pouring rain and slippery mud. Getting it done and getting home was the priority. Semi chisel chain, a 24" bar, a 7t sprocket and rakers at 25thou is a joke in green timber. I don't know how far it'll go, but I'll be trying an 8t sprocket for use with the 24" bar, and might be bringing my rakers down too.
The saw is easier to use, forgiving if you bog it a bit too hard, and felling with it makes me feel safe as I can cut faster than stuff wants to fall.
It does take some grunt to start, it is noisy. They are the only practical downsides I see. Oh, and of course I want everything ported now!