Hi, I'm trying to broaden my Optimus Prime collection and wanted to know what the differences are between the MP-01, MP-04 and Hasbro's 20th Anniversary release. I have the 20th Ann version so if you can use that as a basis of comparaison, it'll help me understand better. A couple of thing I need to specify so you can comment accordingly: 1. I will buy Prime and will open it, transform it and have it on display. As opposed to keeping it MISB or playing with it. 2. Prime's look is more important to me then the number of points of articulations or TV accuracy or such. So something that looks like G1 Prime (robot mode) is a total turn off for me. All comments welcome. Tho I have these specific questions: Is MP-04 the same as MP-01 with an additional trailer? Is MP-01 identical to 20th? Are MP-01, MP-04 and 20th relatively the same size (give or take an inch or two)? Is there significant differences to warrant getting all 3 of them? Or just stick with my 20th ann.? I'm also considering THS-02, Revoltech and Battle Convoy, is there any other "premium/high quality" Primes I should consider? thanks for your help.