Was wondering how well my computer could handle a 5-man boxing team.

Its an Alienware Aurora ALX,

Specs:

-Overclocked Intel® Core™ i7 975 Extreme (3.6GHz, 8MB Cache)
-9GB Triple Channel 1333Mhz DDR3
-Dual 1GB NVIDIA® GeForce® GTS 240 - SLI® Enabled
-1.2TB RAID 0 (2x 640GB SATA-II, 7,200 RPM, 16MB Cache HDDs)

Pretty good internet connection.. Gets a better speedtest.net score compared to all my other friends.

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In Addition:

Would a 22-inch be big enough for my screen + 4 alts? Or should I pick up a small extra monitor for alt screens?