Based on reviews from Amazon, the customers have generally said that the fans are not too loud or noticeable during gameplay (http://www.amazon.com/MSI-GT60-Dominator-424-9S7-16F442-424-15-6-Inch/product-reviews/B00IMTQ5G4/ref=dpx_acr_txt?showViewpoints=1)
You're good to go
Also if you were considering other MSI laptops, http://www.ibuypower.com/Site/Gaming-Laptop
has a great selection! 5% off on purchases more than $1,299 and free shipping.