I purchased a cheap P4 motherboard, which should be free after rebate, and I want to build a Pentium 4 machine on it, not as a primary gaming machine, but for lots of multi-tasking work. Because of this, I was hoping for a high front side bus and hyper threading, but for that, I have to start with the $160 2.4C. For about $50 less, I could have a P4 2.26, but with a 533 Mhz bus and no HT. Or I could go rather cheap, and get a 2.0 - 2.4 Celeron for $70 to $100, and those have measly 400Mhz buses. This is my budget, and ultimately the decision will be mine, but I want to hear if you think the HT or FSB warrants the extra $50 or so for getting the version C rather than a 2.4A or 2.26 CPU.