+1 to this question...i am going through the same issue. I whirlpool hot, then chill. I've been whirlpooling in the kettle for the past few brews, and it works great. My plate chiller has not clogged yet-'cept for those bitter orange peels...my plan is the same as yours, but since i'm switching to a indirect heat herms system, i can first run the hot wort through the ice-laden HLT before going back to the kettle to form the WP. I figure i'll get some cold break this way, then after a 20' rest with WP, i'll plate chill it.