Normal Turnigy packs from Hobbyking would meet those requirements at a very low cost. I guess the returns policy might be the only thing lacking with Hobbyking but at the price thats can be forgiven IMHO.
Bear in mind that the Max-Amps, Hobbykings, Sky-Lipos of this world, and any other brand name you care to mentions, dont actually make the LiPo cells in the batteries they sell. They all buy the actual LiPo cells from a very limited number of 'real' manufacturers so take any claim that certain brand name batteries are better than any others with a pinch of salt.