Hello, I recently completed a build in a Phanteks P400a with a R5 5600X and soon to be a 3080 Founders Edition. I am using a gelid phantom CPU cooler with 2x 120mm 1600rpm 60CFM 2 static pressure fans. I decided that I want to swap out one of these cpu fans to something with a bit of RGB on(phanteks halos rings won't work on this setup). So I have been searching around and come to find 2 fans that I think are quite well performing that include RGB: Silverstone Air Blazer 120r and cooler master sickleflow v2. I have heard some people say in a multi tower cooler it is usually best to have fans with the exact same or very similar specifications. I am wondering if this actually matters? Just a note, whatever fan I will be buying I will be buying 2 of because I need to fill a rear exhaust fan slot too. Just looking for some advice from the cooling experts before I make the order. Thanks for your help!