After I switched to AG, clarity seemed to be more of an issue than with extract batches. With the extracts, a full 5-gallon boil and use of an immersion chiller (we have 55F well water) seemed to take care of it. Maybe the fact that I usually use a secondary helps.
Since switching to AG, I started using Whirlfloc, which works well. Somebody gave me a jar of 5-Star's "Super Moss" carageenan (the "active ingredient" in Irish moss), and 1/4 tsp. of that works like a whiz.
Also, I use only RO water to brew.