I'm not sure I would call the 2.4C the best way to go with a P4 setup these days. It is a little cheaper, but you get into some crazy bus speeds @ higher overclocks, which may be an issue for certain mobos and ram types. You may need more Vcore to get there as well. I think the 2.8C is the way to go (today). It's only $18 more than a 2.4C.2.4C or 2500+ setup
Newegg prices for retail
2.4C $167.00
2.6C $183.00
2.8C $185.00