you just need the knuckles for the brakes, but if youre going all out with the bushings, I'd take advantage of all the suspension parts that are off the car.
As far as I know, you can use the front LCAs (in conjunction with the front sway and endlinks) and knuckles, I don't think the front upper CAs are interchangable between EK and DC though. I don't know what you have for a rear sway, but I'd use the DC rear lower CAs so you can use an ITR (or any teg) rear sway...
Just make sure to order the bushing kit for whatever the suspension peices youre using... Although the suspension is interchangable between cars, that doesn't mean the bushing diameters in the susp. pieces themelves are the same...
:edit: you should be able to use the civic shocks with teg LCAs, so don't sweat that.