I do agree with you Moe, that the current Ork line is the best. I should know, I have plenty of series 1 & 2.
I think I get what you mean here, but the choice of "the best" for me is a bit too vague and subjective. I presume you mean in terms of overal presentation, quality and usability. This I think is close to indesputable.
However, I much prefer the RT/2nd Edition miniatures for character, styling and originality. I find the modern designs rather banal and "by committee" for my tastes. I like the zanier old models, because at least the charm, charisma and exaggerated features are imaginative enough to be memorable and iconic.
I don't dislike the new aesthetic, but I don't find it very bold, and I can't see much that just about anyone couldn't have matched. They're pretty cliché.