" stuff .... on PCIe cards with SATA ports, external power and NICs"
"I'd like to see stuff come out on PCIe cards with SATA ports, external power and NICs"
Computer on Module was mentioned earlier but the comment didn't say in detail what interfaces the COMexpress standards (from the PICMG standards people) supports. You've mentioned a list of interfaces you want, but not mentioned a form factor (other than "on a PCIe card"). Do you just need PCIe bus capability, or PCIe size and shape too?
You might want to have a look at a few CoMexpress products.That's express as in PCI express. They're not the usual size of a PCIe card though. Some of them support all your requested interfaces electrically, but depending on your needs may require a bit of adaptation to get the connectors exactly per your requirements. You could see whether the CoM formfactor could be adapted to meet your requirements. You can even get Atom-based CoM cards, if your requirements still need legacy Wintel compatibility.
If COMexpress is way too expensive (and it might be at the moment), there's plenty similar or lighter stuff without the COMexpress seal of approval.
"let's keep those costs down!"
Get the volume up and (ideally) get off legacy Wintel. Today, COMexpress modules are relatively low volume products premium priced for the industrial/commercial market. Like it or not, Raspberry Pi shows what you can get for not much money when the volumes are right and you don't need legacy Wintel.
[minor update acknowledging "on a PCI card"]