I have these Steadler pencils that my friend gave me. They're erasable, and I really like them XD They bled easily and they hardly ever break. I've used mine soooo many times and their still about as tall as when I got them. The colours are pretty nice too, even though I only have a set of 12, but you can blend them to make different shades. It says Noris Club on the package, so I don't know if that's what their called or what It's made by Steadler though.
Unfortunately student-grade pencils tend to be crap and artist-grade pencils tend to be expensive. If you don't want to buy Prismacolor, which are $30 (on sale) for a set of 36 at Dick Blick I can't see you shelling out $55 for 36 Faber-Castell Polychromos or Derwent Studio pencils. So whatever people are going to recommend, it's either going to be much like what you're already using, or out of your price range.
If you're serious about working in pencil crayon, my recommendation is to obsessively look for deals on 48- or 72-colour sets of the really good artist-grade brands. You may be able to find a nice set for super-cheap someday and they'll last you for a long time.
You know the usual Put the pencil on paper and that's it method? Try using graphite, water color, and hell, even alcohol with them. Color combos like that make drastic changes to the image. It's really cool.