If you’re looking to go the PC route, the best thing you can do is find out from Adobe and Autodesk who their certified systems integrators are. Asking which is better Mac or PC (IMO), will get you more misinformation than anything else. 🙂 Mostly, you want to look at individual companies like 1Beyond, HP, Boxx, Dell, etc. to find out who has the better support, pricing and value. It’s also worth it to talk to your IT staff/person to find out what they’re willing to support. Who knows, they may even be able to get a better deal than you can get on the same hardware.
Finally, for 10,000.00 most systems integrators will give you a great deal on support, especially if you buy more than one machine. Many (especially Dell) offer on-site support, so if you blow a power supply (or something) someone will be there in 12 hours to swap out the part and get you up and running again.
Thanks,
Shawn