Unless we can get some certainty that Lin's knee is going to turn him into Brandon Roy, I say keep Lin. Like you guys I want NY to win a championship. But here's my take:.
Lin is going to be in his third year; normally it takes 5-7 years for players to find their real level. Lin will probably get better -- maybe not Nash or Paul -- but good enough to be competitive on any given day. If that works out, we will have a point guard that we developed (always a source of pride for me), who no one saw.
Melo has about 5 years more of effective basketball. Stat has a couple. Their contracts will expire just at the time Lin is peaking as a PG; so we have someone to build with even if our current crop of stars age.
So what we will get in NY is very competitive basketball for much of this decade, not like what we saw the last decade. Probably all the way into the ECF for most of those years if we get a healthy team into the playoffs. We got the bad draw this year on that count.
We reduce the probability of a bad team even with this set of players if we find a really good coach that can make Amare + Melo + Tyson work.
So I would rather that we get a good coach (to figure out Stat, Melo, etc) + Lin + healthy players.
And we aim to keep Shump and Novak.