Compatible system and possible upgrades?

For starters, i would get an air cooler. Something like a Cryorig C7 or Hpyer 212 EVO. Thing about liquid coolers if there are too many risks. Worst thing about air coolers? Fan goes out, but those are cheap and replaceable. You don't need 32GB of ram. 16GB should do you just fine. Save yourself 100 punds.

Wouldn't trust Seagate as they have a bad reputation. Get a WD drive. Do you plan on doing RAID or something? They make hard drives up to 6TB.

Don't understand why you are getting two GTX 1080s, and then sticking with 1080p monitor. How about you get a 34" 4K Ultrawide? That way you only have one moiniotor, and it is clearly more than enough real estate.

Those fans are just for show, and truly don't help keep your system cool.

Sorry to critizie, but I just think you have areas to save money, and do better. No need for a triple 1080p setup, when you go two of the most powerful card on the market (next to Titans).