Hey need to know if this is a good computer?

Ok, so i wanna buy a computer and i wanna buy one that has enough space to run WoW w/o any lag and can hold a bunch of songs. Im not really good with computers but i think this one might work. Will it? (btw i have comcast and its hardwired to my comp)

these are the specs
-Intel® Pentium® dual-core processor E2200 (1MB L2, 2.2GHz, 800FSB)

OPERATING SYSTEM - Genuine Windows Vista® Home Basic Service Pack 1

OFFICE SOFTWARE - Microsoft Works 9.0

WARRANTY & SERVICE - 1Yr Ltd Hardware Warranty, InHome Service after Remote Diagnosis

MEMORY - 3GB Dual Channel DDR2 SDRAM at 800MHz (4 DIMM)

HARD DRIVE - 320GB Serial ATA Hard Drive (7200RPM) w/DataBurst Cache™

OPTICAL DRIVE - 16X DVD+/-RW Drive

VIDEO CARD - ATI Radeon HD 3450 256MB supporting HDMI

SOUND - Integrated 7.1 Channel Audio

MEDIA READER - No Floppy Drive or Media Card Reader

---(it's a -customized- Dell 518)--- its a desktop

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