Depending on what you have for components, you may be able to upgrade economically. I'm on an AMD Athlon running at 1.37 Ghz, which was an upgrade from my previous Athlon 700. I then upgraded my brother's AMD K6-2 400 to the Athlon 700 and it wasn't that bad an operation. First, if it will fit in your current system, make sure you get PC 133 SDRAM for your memory upgrade. As long as your K6 uses SDRAM, which I think it would, it doesn't matter if it can't run it at 133Mhz, or even 100Mhz, it should still work at the lower speed. This will allow your memory upgrade to migrate to your upgraded system, if you go that route. :-) Athlons need an AMD approved 300 Watt power supply, so say you buy a new case and PS for $60. A new motherboard, (I recommend one using the Via KT133A chipset) is about $120. A 1.2Ghz Athlon can be found online for about $160. If that's to much right now, you could get a 900Mhz Duron for around $75, maybe less, I haven't checked in a few weeks. As long as your video card, sound card, modem and drives are half way decent, they could migrate to the new system. With out the cost of the memory upgrade, which you are going to get anyway, it's possible you could buy the needed components for not much more than $300. Unless you have experience home building systems, you might need to pay a local computer repair shop to build the upgrade for you, but this should just give you an idea of what is possible. I'll stop now. I could go on about upgrades forever. :-) Depending on what you can "salvage" from your current system for the new one, an upgrade may or may not be practical. Every item above what is listed above that would need to be replaced as well adds to the cost. Also, the labor cost of having a good tech person do the upgrade for you has to be added in... Just wanted to point out that such an upgrade from a K6 isn't automatically impractical. The improvement from a K6-2 400 to an Athlon 700 on my brother's system was incredible and you could get an even higher speed grade at current prices very reasonably. :-)