Dude....the article was written December 3rd, 2003...you gotta take these things into consideration when you're buying something like that. Have you ever built a computer before? Because if you haven't going from compaq to building a computer will be like day and night....compaq..dell...peoplePC..all them build their computers so you have to take it to them, so looking inside that case for referrence won't do any good..
If you want to be able to game then I say you got a couple options depending on how good you are with computers. You can take that 2600+ (which BTW has the barton core I believe which is the same as the 3200+ which means if you have good cooling...better than stock heatsink and fan...then you can overclock your 2600+ to 3200+ speeds) but overclocking requires some good general knowledge of the computer.
Coincidentally my brother just got the 2600+.....nothing wrong with the chip at all, infact it is a rather good buy mainly because of it's overclockability. So if you do wind up getting that chip you would need to make sure you get a motherboard that has all the right OC options you need.
I'm looking at that chip...and it's 1.9GHz 333FSB.....you should really get a motherboard that can support 400FSB and Dual DDR400 as well so you can have your memory in dual channel if you have two of the exact sticks... So since your chip is 333FSB and if you got a 400FSB motherboard, that means you would be able to overclock that 1.9GHz 333FSB to 400FSB with 2.2GHz provided you have good enough cooling and your RAM is also PC3200 which is 400MHz. I could be getting off onto stuff you don't understand sorry if I am and sorry if I'm underestimating your level of computers
The 2600+ is decent, but you should either look into getting a processor with a 400FSB or look into getting a motherboard which provides adequate overclocking options so you can simply raise your 2600+ from stock 11.5x166 = 1.9GHz to something like 11x200 = 2.2GHz and the 200 will give you that 400FSB....anyway I'm getting way far past your original question so just let us know what options you might consider taking