MSI K9N2 Diamond 3 way SLI, PCI-E 2.0 x16

I recently purchased this MB with the AM2+ socket. I have read on newegg that some people have had issues with this board making it go SLI. I also have heard in person from my computer tech that this board has some issues with the gForce 9800 series vid cards. I am in the last stages of getting the componets of my gaming computer together and i want to be sure to get somethig that I know won't be an issue from the start up. I also can wait on purchasing multiple cards for SLI for now, but will be going that direction soon and as money allows. I have looked through the threads and really didn't find anything along this nature of a querry.

This is what I got so far for the build:
Power Supply : Ultra X3 1000w modular
CPU : AM2 AMD 6000+ 3.2 gig w/ a Zalman 9700 CPU fan
Ram : 1 gig 800 mhz of OCS SLI x4 (4 gig total)
Hard Drive : 150 gig WD Raptor 10,000 rpm - the plan is to use this for the OS only but may change my mind(may get one more)

Need to get:
Case - Looking at the Antac 900
Vid Card - Looking at the best I can get for about $300 +/-
CD/DVD - Need to get this but they are cheap
Hard Drive - May get the 300 gig Raptor for more storage (for games)

The primary usage will be for gaming. Some web surfing.
Any advice or knowledge shared will be highly praised. Sorry if this is not in the proper thread. I did look, but since there is overlapping of questions/issues I picked the Motherbard Forums as this is kinda the root of the question.