Firstly, I can't stand the biased crap that sprouts out of Tom's arse and onto that excuse for a site, so here's a link to a real cooler comparison:
http://www.dansdata.com/coolercomp.htmSites like
FrostyTech specialise in testing cooling equipment, and seem to put them through quite a thorough workout. More sites like that do exist, so look around.
As dauntingly powerful as it sounds, the XP2400+ probably won't put out much more heat than the highest rated Tbird CPU's - smaller processes and less voltage mean that the heat doesn't always go up according to speed. The Volcano 7+ is a nice choice, with the ability to throttle its fan speed depending on CPU temperature. However the best CPU cooler won't do much good if the heat is only pumped into the surrounding air within the case.
Planning the airflow is essential, taking into account things such as the CPU, video and other cards, PSU and hard drives. Clean lines are ideal e.g. in the front, out the back. If there's enough space over the cards, mount fans there (a lot of cases are capable of mounting 2x60mm fans, or even have a space for an 80/92mm fan) - they will be close to the CPU and provide a quick way of extracting its heat, plus the heat from the cards. It is often recommended that you have a slightly higher cfm intake then outlet, the extra pressure serves to keep dust out of all those little gaps rather than inviting it in (I think Top Gun already mentioned this). Mounting a fan on the side panel directly over the CPU is an option, so long as you take care when removing the panel, and have suitable intakes mounted
elsewhere in the case.