All those are on ebay and im having a tough time deciding which one is best for me I have an emachine T1842 desktop comp with 2 slots of possible ram adding and the max i can get is 2gigs.. I have one 256 stick as we speak but i need more speed.. should i get 1gig and have 1256 or get 2gigs and have 2000.. Theres one up there that is selling 2 at once for a cheap price but he said he doesnt know the brand of it.. Theres other ones that have brands like NCP or Corsair.. any reccomendations from you guys would be a big help.. thanks