I certainly wouldn't recommend the 805. It was a good chip for price/performance when the article was written, but now with the AMD price drops, there's really no reason to buy it, especially once you add the cost of an aftermarket HSF and the increase you'll see in your electricity bill. As it stands right now, AMD has the best budget CPU's. For what you'd end up paying for an 805, you could get a faster AMD chip. The only problem with AMD is that you obviously wouldn't be able to upgrade to a Core 2. If you go AM2, you'd have an upgrade path there, just not an Intel one.
I'm sure you don't really need a Core 2, but that extra power is nice to have. I'd go for a e6300 system myself if I was on a budget. However, I'm sure you'd probably also be satisfied with something like an X2 3800+. It's probably the best budget chip right now. But with an extra $100 you could get an e6300. It kind of depends on how strict your budget is and how much upgradability means to you.
If you've never ran an Athlon X2, I think you'd be surprised by how fast they actually are for casual use. Unless you're encoding or gaming or something, they're plenty fast -- definitely faster than whatever the equivalently priced Pentium D would be.
Also, remember that clock speed isn't everything. Architecture plays a huge part. So the fact that an 805 can be overclocked to a higher clock speed than a 3800+ doesn't mean much. And just for reference, the 3800+ is generally regarded as a good overclocker too.