If yr gonna do an inground pump, you want a sewage pump. A sump pump is for ground water only. Sewage pumps have a macerating blade that chops up da nasties. Around this forum, Zoeller gets consistent high marks. IMHO stay away from the big box brands. It's WELL worth the extra $50 to get a better pump. I speak from experience.
These pumps are designed to sit in the ground in a concealed pit. The pit is designed to accept drain lines like the rest of yr house, so ANY toilet will work with this. Know, though, that the hard work is digging thru the concrete to seat the pit and the drain lines.
If that work has not been done yet, then you'll do well to CONSIDER an above-ground pump unit (also made by Zoeller) or Saniflo that sits behind yr toilet. You have to use a special toilet for that type of unit. Also, the inlet and discharge are smaller than the inground units so they are reputedly prone to clogging. But, for their ease of installation, it's definitely worth a look see.
