You might check out the SVRider.com board, and post asking for recommendations. Very helpful crowd there.
NewEnough is good if you want to be able to return what you buy. Their customer service is oustanding. EBay is good if you're pretty sure you won't need to return it.
I have a pair of tourmaster Decker leather pants that I like a lot. They have full length zippers on the side so they're easy to get in and out of, as well as CE-approved armor. If you're worried about being hot, get perforated leather. At a minimum, make sure the leathers have a mesh lining so they're comfortable on your skin. Also make sure that you get jacket and pants with a full circumference zipper so that if you crash, your jacket doesn't ride up and expose skin.
BTW, you can definitely get leathers for less than $600 if you shop around, particularly if you buy from EBay. Get boots too, Oxtar and Alpinestars make solid products. What size shoe do you wear? I'll almost certainly be selling a pair of almost-brand-new motorcycle boots in a couple weeks.
Also check
www.motorcyclecloseouts.com, they have some good deals sometimes. I think NewEnough has Honda leather pants on sale for $85 right now, if you're not tall I'd recommend those. Very comfortable pants.