Is Corsair Dominator/Dominator Platinum worth it if I'm not going to OC or do anything special?
No. There is no reason at all to go with anything other than Vengance or the low profile Vengance if you have an aftermarket CPU cooler. GSkill Ripjaws X is also just as good. The Dominator series is for overclocking and running at very high speed. Pretty much something no modern CPU either from Intel or AMD needs. DDR3 1600 is the sweet spot for both brands.