I'd like to throw in yet another request for "Peak Performance" (McCarthy).
There's two or three great action piece, with a good deal of spirited adventurousness in the opening of the first before the plot shifts. And then the piece as Data plays a re-match of Parrises Squares in the end.
The Wounded (McCarthy) especially the beautiful cue where McCarthy quotes the melody of "The Minstrel Boy" after O'Brien sang the tune. add me to the list of wanting "the wounded"
And me; I love that episode, and particularly the Minstrel Boy quote mentioned in the first quoted post. Sometimes I'll pop in the Blu-ray just to listen to that part.
I'd vote for that too. I found that this episode had a strong score in general. I remember that there was a great dramatic cue when the bridge crew were following the battle of the Phoenix against the Cardassian ships on the screen. I think from season 4 this might be McCarthy's best episode score although I have to admit I don't remember all of them. From season 3 I think "The Hunted" is a definite must.