"I highly doubt our third best player will be as good as Marion was in that 61 win season (18 pts, 10 rbs, 2 steals, 1.5 blocks, 52% FG). We don't have a third or even a second player who has come close to those numbers."
The amazing thing about those numbers is that the Matrix was able to consistently average 10 rebounds a game year after year even with other teams and he was just 6' 7". But there is more to it than just those numbers. During his best season in Phoenix the Matrix was playing 40 minutes a game. In his first year with Phoenix, he averaged 6.6 rebounds a game playing 24 minutes. Anthony Randolph in 22.7 minutes last year, averaged 6.5 rebounds a game. I think he is coming along slower because he needs to add weight and muscle before he can rebound up to his potential. Also being 6'11" may affect his ability to improve significantly on his numbers, once he adds more weight. AR only scored 11.6 points a game, which is definitely not 18 points a game, but he shot .443, and certainly didn't have difficulty getting off shots. His ability to take score more, probably relates to Don Nelson wanting him to concentrate on rebounding, rather than scoring.
I once had about a half hour conversation with Tiny Archibald. He came from a small college and his coach didn't believe he was an NBA player. I asked him how an unproven player could get so many scoring opportunities from his team early in his career. He said he replaced Oscar Robertson in the lineup, who was traded the previous year. Oscar was a 30 point a game guy, so the team was set up for scoring from the guard position. Also I believe Bob Cousy was the coach, and Bob Cousy certainly was open to scoring from the guard position. So my point is that scoring frequently depends on what the particular team is set up to do.
I believe both Anthony Randolph and the Rooster are both capable of being high quality contributors to the Knicks. but I would add that its not just about a team's offensive contributors. The Knicks likely have more players proven to be interested in playing defense than Phoenix did back then. It hard to figure what Knicks future potential is with their current lineup, plus the extra money they have to allow them to add even more talent in the next season or so.