Let's say in the 200-5oo range? Anything else
i should be aware of in the process would be most appreciated also. Thanks again all!
If you want to go Conroe, I would look at the E6300 & some "value" DDR2 RAM. As far as a motherboard goes, I would wait until a cheap one with integrated graphics comes along - just make sure it has a PCIe slot for when you want to upgrade your graphics. Yes, integrated sucks (comparitively), but it will still be many times better than the one you have now.
As far as a low-price AMD setup goes, I've not dealt with the "value" motherboards, so hopefully another member will jump in with a recommendation.
Keep in mind, that you'll probably have to buy a new Windows, a new power supply (I think yours is just 200W, might be enough for integrated graphics, but you'll want to replace it when you get a graphics card.), and maybe a new case (The power supply HP usually uses is smaller than the standard, so when you upgrade - the new power supply may not fit.)
You might even be able to find a prebuilt computer with everything for less than it costs you to build one yourself (This happens a lot in this price range). Just make sure it has a PCIe slot, so that you can upgrade further down the line. Also make sure it's not a Pentium D (or if it is, make sure that its motherboard will support a Conroe). If you're going AMD, then make sure it's socket AM2, not 754 or 939.