Look at the new HP all in one's.
The 120e or 110e
Check out th specs and make sure one meets your printing and scanning requirements.
I've got an Epson NX530 that works nicely over Wireless. I've never directly connected it.
The NX are the home/consumer versions and they have some slightly more expensive home office/small business versions that use the same mechanisms.
I don't think any of the front panel buttons work (except Copy), but I can scan from Image Capture which I prefer over any of the bundled scan utilities I've ever had. I think my wife scans using the Epson software and has never asked me how to use it.
I really don't print that much, so I can't comment on the economics of ink usage.