First of all, good luck on your hunt. Hope you find something you like.
Anyways, we have regular litter boxes, a Litter Maid Ultra, and a Petmate Purrforma. My mom is always getting the new automatic ones to try to save time.
In my opinion, the Litter Maid works fairly well. It's pretty easy to clean out (just open the lid, remove the plastic tray, and dump out the waste), usually doesn't jam, and our cats use it a lot. All you really have to worry about is emptying the tray and putting in a new one once and awhile because it gets dirty. You may have to fix some occasional jams, unclog the rake, etc, but for the most part it works fairly well.
The Petmate Purrforma is definitely not as easy to work with as the Litter Maid. To clean out the container, you have to first take apart the lid and then remove it. Then you have to take this casement off surrounding the actual litter box. Finally, with the other casement off, you lift the lid, and take out the waste container (which is a plastic bag). The whole process of cleaning out the box is definitely more time consuming and involved then would be with a Litter Maid. The rake tends to get stuck a lot more than does the rake on the Litter Maid as well, and it's usually much easier to access a jammed rake on a Litter Maid (Petmate involves taking off the lid and etc). One nice feature of the Petmate is that it comes with a shag carpet ramp and helps track litter better. The rake also can be removed to clean off if desired, whereas a Litter Maid rake is pretty much attached.
Imo, the Litter Maid is a good choice (even though I still sort of prefer the regular litter boxes over anything). Hope this was somewhat helpful.