The only really bad deal on the egg right now is the i7 960. Double the price of the i7 930 for a marginal advantage. One could also argue that the 6 core i7's are a bad deal in price/performance, but there really isn't anything else on the market that matches them in power, so you've really got no choice if you want one. The 6-core Phenom chips, however, are both fairly good deals now that they've knocked the prices down a bit. The comparably-priced i5 quads still beat them in most current games, but newer games with more multithreading capability will do better on the Phenom chips.
You should also avoid the C2 AMD chips, but for different reasons. The C3 ones are more stable when used out-of-spec, which includes using really fast RAM. (the only C2 quads on the egg right now are the 620 and 630, anyway...)