I use (and this will make you laugh) Aussie (http://www.aussie.com/) hair products. As a rule, I use the daily 'Mega' shampoo and conditioners, but they also have deep conditioning treatments that are pretty awesome. The products smell gorgeous, too.

I've got a tube of Body Shop's 'Palmshine' deep conditioning mask, which is the best thing on earth for getting my hair to look good, but to my horror it's been discontinued in the UK and I spend hours scouring the Body Shop discontinued and reject stores for more of it. If you can find that in the States, it's well worth a try.