A few people said to get the 4600/Manchester core, but the manchester only has a 512kb L2 cache while the 4400/4800/Toledo core has a 1Mb L2 cache. So if money is not an issue get the Toledo core. You could get the 4400 which is clocked at 2.2ghz, and overclock it to 2.4ghz which makes it the same as the more expensive 4800, if you wanted to save some cash to put toward something else.
I agree 100% with Vampire_Slayer... Money no issue = 4800. Want good but want to save a little money = 4400. Cant afford Toledo core = 3800 Manchester overclocked to equal a 4600 manchester, or whatever.