JO and Gortat is a wash.
holy God in heaven, i will make no comment on anything else you said, but this is so far from the truth i don't even know what to call it.
at this point in their careers, gortat is SO much better than JO, not to mention he's a lot more durable.
http://www.basketball-reference.com/play-index/pcm_finder.cgi?request=1&sum=0&p1=onealje01&y1=2011&p2=gortama01&y2=2011it's really not even anywhere close.
marcin gortat is an above average starting center in this league. he's young, he's on a reasonable contract, he's a good finisher, he's a good defender, he's athletic, and he's durable. he makes similar money to what Perk makes, and honestly, i would take Gortat on my team any day over Perk. Gortat is a much more complete player, even if he's not on the same level in 1 on 1 post defense (an overrated skill in a league devoid of impact post scorers). gortat's also a couple inches taller than both Perk and JO.
ideally, JO is a 15-20 minutes per game backup. he's decent as a backup when he's healthy (which is not often), but if you're relying on him to produce much, you're in trouble. he also has basically no lift left, and he's got very little quickness. he's an okay defender, and he can defend 1 on 1 inside and rotate for a block or two now and then.