Knicks Defense
Starting lineup
C - Tyson Chandler - elite defender
PF - Amare Stoudemire - average defender (as a starting four)
SF - Carmelo Anthony - solid defender, capable of very good defense
SG - Landry Fields - very good defender
PG - Toney Douglas - good to very good defender (yeah, he sucked in the playoffs last year but he has played good defense outside of that series)
Bench
PG - Mike Bibby - abysmal defender
SG - Iman Shumpert - rookie with good defensive tools and athleticism, likely average to above average defender
SF - Renaldo Balkman - good to very good defender
PF - Jared Jeffries - average defender (alongside Amare, one shifts to center where either one is really poor defensively)
C - Josh Harrellson - rookie with limited athleticism, likely very poor defender
* Baron Davis - solid defender. Replaces M.Bibby.
Overall
I see two major liabilities. Mike Bibby and the lack of a defensive anchor when Tyson is resting. Across the rest of the team, I see average or better defensive players.
Looks to me that the Knicks have the personnel to build a pretty darn good defensive team.
Although, Mike D'Antoni is a pretty big unknown variable here. Very much looking forward to seeing how D'Antoni handles this roster. A Jeff Van Gundy type would be a brilliant replacement should D'Antoni fail.