I thought I wanted one of these also. I ended up going to
Best Buy and looking around. I eventually spoke with a representative of one of the companies (Epson, Canon, someone) anyways, he asked me what I was planning on doing with it. I wanted to scan some of our photos and put them on disc to have put up in case something happened. He steered me toward a stand alone scanner because of the resolution it offered. He said the all-in-ones aren't as good. I ended up buying an epson, it's not top of the line but not the bottom either. He didn't steer me toward a brand but showed me what to look for. He also told me there were more at Office Depot or one of those places.
As for the printer, if you are using it to print pictures, find one that specifies that it is used for pictures. Read the reviews, but with an open mind. I have an older Epson stylus photo printer. If you read the reviews, you will see people complain about the speed that it takes to print pages (print, not pictures). It was meant to print pictures with clarity, not speed. Just something to keep in the back of your mind.
I often complain about my son's printer. His came with his computer when he bought it. It prints pages fine, smears photos. It was meant for paper. I also complain about how expensive the ink is. Someone here pointed out that you should be wary of cheap or free printers as they usually make up that cheap price with expensive ink.
Not sure if any of that helped but hope it gives you a few things to keep in your mind while looking.