I'm an AP owner, and can say it's a very nice piece of armor. I'm very happy with it. I build it ANH style, and it's awesome.
I've never seen an AM, so I can't say anything about it. To be sincere, the only fan sculpt I personally like is TM, but as I said, I haven't seen an AM in person, so maybe it's worth considering.
But, if you want to go ROTJ style, Joe is your man. (Specially if he has an offer for you! )
I hope you can build your armor soon. There are nice examples of ROTJ EIBs around, so try to get as much info as possible.
Cheers.