For the Bathroom, (As for I am in the same situation) I would go with the Zoeller "Qwik Jon" or the Power/Up flush system (they are both the same) the "Qwik Jon" is from Lowe's and the Powerflush is from Home Depot...anyways, its where the toilet of any brand sits on top of the system and flush's into it (also a sink, tub/shower) can also drain into the system. This ejector also uses a standard 115 voltage (3 prong neoprene wire) to operate (like all systems).
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One of my neighbors just installed the above-ground system that I just described...
They had framed around the toilet w/ tile and you have to step up...I think it looks
nicer to how you have to step up to the toilet...I would think the room would look to
big w/ out the toilet being elevated