nixone, good choice there, comments below
@unknownuser said:
Intel® Core™ 2 Q6600 Quad-Core (8MB L2 cache,2.4GHz,1066FSB)
2GB Dual Channel DDR2 SDRAM at 667MHz- 2DIMMs
128MB nVidia GeForce 8300 GS
80GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache™
Genuine Windows Vista® Home Basic
Single Drive 16X CD/DVD Burner (DVD+/-RW) w/ double layer
CPU: Quad core will future proof you somewhat if you're not going to be upgrading again in the next 12 - 18 months. Just be aware that not all software can make use of additional cores, SketchUp are one of those that don't. Having said that, you'll be able to run SU together with other apps with ease. Most rendering apps can make use of additional cores, depends on how much rendering you do.
RAM: RAM does play a role in computing speed, but the general public probably won't notice the difference in their everyday use of a PC. You might want to upgrade to 4GB of RAM at some point using that resource hog called Vista. RAM timings (CL ratings) is another thing that influences RAM performance, the lower the CL rating the better the RAM, for DDR2 667 RAM you should have either 3-3-3-8 or 4-4-4-12 timings, any higher than that and you've bought some slow RAM.
GFX card: Not a bad choice I would have looked at a nVidia Geforce 8500 / 8600 though, depending on your needs, something with some more onboard memory would have been better. Personally I prefer ATi GFX cards due to better image quality.
HDD: Not much info given here, but that should serve you well, I only use Western Digital drives though.
OS: MS Windows Vista Home Basic. Hmmm, take a look at the features, don't know if it'll be the right choice (IIRC there are something like 11 diffrent versions). If I bought Vista tomorrow it'll be the Business edition, at the very least.
Optical drive: Should serve you well, my brand of choice is Sony here.
Motherboard: You've made no mention on which motherboard you're getting, this is one of the more important components in a PC. If the mobo isn't any good the PC may very well be unstable and perform poorly.
Monitor: LCD monitors need to have a response time of less or equal to 5ms to be any good, any higher and you might experience ghosting.
Hope the comments above helped somewhat and didn't confuse you further.