Depends on which software programs you'll be using. Poser doesn't actually utilize hardware accelleration, so the 3d card won't matter. I've got a GeForce 4, and I use 3dsMax, and honestly, I've had problems with the drivers; Max was crashing on me constantly in D3D mode, until I switched to their internal HEIDI software accelleration. Where memory is concerned, I'd recommend 512mb; potentially you could go up to a gig or more, but most programs that aren't specifically designed for it may not utilize more than 512mb. Poser 5 (and possible earlier versions as well- don't have experience with them) tends to fill up all avaliable memory, then dig heavily into the swap file when rendering, so be sure you've got a nice, fast hard drive. If you can afford it, set aside a second physical drive and use that for your swap files; then it won't get cluttered up as much. Personally, I've got a P4 2.4 as well, and I'm more than happy with it. I'd go with the single processor over the dual processor setup- Windows still doesn't handle multiple proccessors as efficiently as it should (BeOS does multi-thread processing well; but I doubt we'll ever a BeOS version of Poser).