Ok,
I am not here to debate brands. I am building a new system myself to run vista 64 ultimate sp1.
To the OP: set up to run vista 64 ultimate and stay away from mac. What I am building:
case:
http://www.newegg.com/Product/Produc...82E16811129025
mobo:
http://www.newegg.com/Product/Produc...82E16813131593
cpu:
http://www.newegg.com/Product/Produc...82E16819103191
cpu fan/heat sink:
http://www.newegg.com/Product/Produc...82E16835185125
ram:
http://www.newegg.com/Product/Produc...82E16820231122
psu:
http://www.newegg.com/Product/Produc...82E16817182069
monitor:
http://www.circuitcity.com/ssm/HP-W1...oductDetail.do
Video cards are in a odd place at this moment. The new dx10.1 is out and currently the radeon 3870 can run it BUT the nvidia 10,000 series is coming soon, which means that it will be big boy on the block. All the other cards will drop in price. Best buy had a 8800gt that was pci express16 but are sold out atm, they were under 300.00. I suggest a 8800gt or a 8800gtx, or if you can hold out for the 10800 that is better but you will need deep pockets, be sure it is pci express16.
Vista 64 can see up to 8gb of ram. You may want to wait for vista service pack 1. The system I have listed leaves alot of room for upgrades and fun tweaking stuff.
As far as hard drives go, I suggest Western Digital that is sata 3.0 anything else is ancient technology, sorry raptor guys.
After what I have listed above you can upgrade for a long time. The case is large. Also the amd3 mobo's are coming out along with amd3 chips, look out pentium.(yes, pentium chips are faster than amd, at this time, if you really need to measure things in miliseconds!, its like: what is faster? the speed of light or the speed of dark? fast is fast. I have had a poor past with pentium) . stay clear of quad core prossecors, the architecture is buggy.
but
If I had to choose between the 2 you have listed I would go with the NON-mac.