Half the people will say ASUS and the other half will say Gigabyte. Some people will only by ASUS(me
) and some people will only buy Gigabyte.
Either one will be good. Like Nik_I said go for the cheaper board. BUT IF you are going to Crossfire the HD4850 getthe X38/X48 chipset like Jevon said.
The Q9450 is a good overclocker, Make sure you get a good heatsink and fan. and IF you are going to overclock get DDR2-1000 or higher. The Q9450 will do 450FBS on air most of the time. If you get DDR2-800 the RAM may hold you back. Not all DDR2-800 will make it to 900 or 1066.
The P5E Deluxe is the X48 Chipset and is alot cheaper then the Rampage Formula and its the same board minus the LCD Poster and the onboard buttons.
Dont go with DDR3, its cost to much money compaired to DDR2 and you will not see that big of a difference on day to day use.
When you look at the boards, make sure that the board has all the options you need (ie: firewire, enough USB, eSATA, RAID).
The HD4850 is faster then the 8800GT, Its faster then the 9800 GTX in most cases. The 8800GT is a good card it will run most games. The other question is what resolution are you going to be running. If you are going to be running at a high resolution, the HD4870 might be a better choice.
1Haplo