Try Razer or Alienware, they have awesome gaming laptops. Although I would recommend building, if not purchasing your own gaming rig. You can easily get a good computer with a GTX 770 and a decent processor. What games are you planning on playing with it?
Horses is something that the community has been asking for a millennium, and the fact that mojang is working with the creator of mo creatures, will make horses better than we could ever imagine. Can not wait. But it will be a struggle to update all of my mods when the time comes!
I know the mod Defiantly works, Because I could play it when I recompiled it in MCP. I just dont know why it does not work when you try to actually install it!