Funny, I was thinking the same thing. The knicks have 2 out of the big 3 (at least 3) that you need. If somehow they get Melo, then you have 3 legit scoring options and 3 legit players.
If you match up the Miami 3 vs the potential NY 3, NY gets the edge with STAT, and Miami gets the slight edge of LBJ over Melo and an edge of Wade vs Felton. I think NY then gets the edge from the rest of the roster depending on what they give up to get Melo. If he comes via FA, then NY could be better than Miami next season.
As for a Boston matchup, you give Boston the edge as Rondo makes it a big 4. However, due to age on Boston's side, A Knick team with Melo, Ray and STAT could cause some damage in a 7 game series. Next season, with one more year of mileage, that NY 3 will have the edge, IMO.
That leaves Orlando. Nelson = Ray, Howard > STAT (pretty close though), Melo > Lewis. NY bench is better.
So, in the end, the analysis is for NY to wait and sign Melo as a FA if at all possible. If not, they need to trade away AR, TD, Curry but not Wil, Gallo or Fields.