One of the decisions you need to make is if you want small cell or not. If you want small cell, your choices are different. If you don't care about cell size you have more choices.http://www.bushfarms.com/beesnewbees.htmhttp://www.bushfarms.com/beesnaturalcell.htm
Plasticell is not small cell. It's 5.4mm, I'm pretty sure (I don't have any here to measure). It has raised cell walls on the plastic and possibly a very small amount of wax sprayed onto it. Acceptance is more difficult with this kind of foundation, but it's pretty permanant. If the wax moths mess it up you just scrape it off and let the bees rebuild it.
Duragilt is a smooth sheet of plastic with a layer of wax on each side that is then embossed. In other words it's like wax foundation that has a plastic core. It does not require wiring (neither does the Plasticell) and is accepted about the same as wax foundation is. But if the wax moths mess it up or the bees decide to reuse the wax and tear it down to the plastic they will never rebuild on the plastic.
You can also buy unwired wax and vertically wired wax. Acceptance is not an issue with wax and if you buy the vertically wired wax, you won't have to wire it.
As far as smaller cells, Pierco frames and sheets run from about 5.2 to 5.3mm (see the link above for pictures of exact measurements) depending on the size of the frame or sheet. This is closer to natural sized.
Mann Lake PF-100 and PF-120 plastic frames with foundation, are slightly under 5.0mm. This is a pretty good size, although I'd prefer 4.9mm.
Dadant small cell is available in 5.1mm and 4.9mm, wired and unwired, deep and medium. You may have to call to find the one you want as they don't all seem to be in the online catalog. They are also available from Brushy Mt.
Or you can stop using foundation all together:http://www.bushfarms.com/beesfoundationless.htm