Personally, Don't like the Evo. Seen to many posts with issues on Af1.
Mpl, I had one, no issues and did what it should. I got a seal replaced for a mate who had one on his Duke, No charge, 1 week turnaround. I very nearly became the uk importer for Mpl so got to know them quite well and they are good guys. The only reason i didn't was Ebay (them auctioning items on it essentially)
Oberon, never used one. I think i saw early incarnations had their issues (too stiff) but i think they ironed those out. From what i have read it's good gear.
Don't think you will go wrong with either the Mpl or oberon. Go with the best deal you can get.