Thoughts and comments on this future configuration

Hi Ladies and Gents,
I have a new toy being delivered Monday to take over from our 5 home-made servers (work-stations pretending to be servers).
I will be loading Server 2008 x64 Enterprise on the 100GB mirrored drives. The other 7 TB drives I am thinking Raid6 with 1 drive as a hot swap, not sure yet. I will then load a hyper-v server (prob 2003) with Exchange 2007, another hyper-v with SQL2005, another hyper-v with staff roaming profiles and home directories, and finally another hyper-v with assorted files and apps, mostly storage for IT installs and documentation. I want this baby to be as fast as possible for our staff.
I will be teaming the nic ports to a gig managed switch and teaming 2 gig ports from the switch to our backup server
If you would, please give me your thoughts, ideas or problems you think I may encounter. Thanks very much.
Here is the setup:

1 X INTEL DUAL XEON S5000PSL SATA E5000P SERVERBOARD
2 X INTEL QUAD CORE XEON E5430 2.66G 12M 1333 XD VT
8 X 4GB 667MHZ DDR2 CL5 ECC DRx4 FB INTEL
7 X RAPTOR WD1000FYPS 1000GB SATA2
1 X BATTERY BACKUP UNIT FOR 3WARE 9650SE
1 X 3WARE 9650SE-16ML MULTI-LANE SATA2
2 X INTEL PRO/1000 SERVER NIC
1 Intel EXPI9402PT 1000Mbps PCI-Express Two Gigabit Copper Server Connections 2 x RJ45
1 X ATI RAGE XL 8MB
RAID 6
1 X 3WARE 9650SE-2LP SATA2 RAID CTRL (RAID 0,1,5,10,50)
2 X SEAGATE 100GB 7200.1 RPM SATA 8MB CACHE LAPTOP DRIV RAID 1