Love and Brooks for Curry, Lee, Gortat, and Harden
So you go from:
PG - Steve Nash SG - Nick Young SF - Wesley Matthews PF - Kevin Love C - Tyson Chandler Util - Mike Conley
PG - Stephen Curry SG - James Harden SF - Nick Young PF - David Lee C - Tyson Chandler Util - Mike Conley
So Curry is definitely an upgrade to Nash (though you will lose significant AST) as is Harden to Matthews. Losing Love hurts, but Lee is a similar player overall so that helps. Overall it makes you better, and I wouldn't worry about the other guy's team; make yours the best it can be.
Is there a reason why you'd play Chandler over Gortat?