My recommendation is build a cheap AMD rig (but still fast enough for daily work. i.e. an Athlon 64 x2 5600+ based system) to hold you out until Nehalem. The AMD rig will be cheap, and you will be able to reuse the case, disk drives, power supply, and possibly graphics cards with the Nehalem build. That is what I plan on doing. According to Intel, nehalem is going to be the biggest change since Pentium Pro, so it's definitely worth the wait.