I had a trifire R9 290 with the stock coolers, nothing helped except opening the case and directing a big fan blow directly at them.
For you I imagine you'll be fine if you got the stock Titan coolers for all of them.
I was considering a Lenovo Y50/Y50 Touch for $1K-$1.2K or the ASUS GL551 but since I won't be using the laptop much and probably won't game on it I went and bought the Newegg deal on the Gigabyte P15V2 with a cheapo ASUS tablet for $909 shipped only, it has nearly identical specs except that it...