Holiday

OK I am planing on buying a domain name(first time) from GoDaddy.com,
now I have a question, which "Server Operating System" should I get Linux or Windows?

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OS: Win Vista Ultimate
3.00 GHz Intel Pentium 4 Processor With HT
NVIDIA GeForce FX 5200
1536MB(1.5GB) DDR PC2700 RAM 2x256+2x512
500GB WD HD + 250GB Maxtor HD + 160GB HD
BLASTER Live! 24.bit 96kHz/100dB SNR HD
SONY Double Layer DVD Writer DRU-720A
HP DVD+R\RW DVD Writer
LCD 19" Flat panel f1903