Trigger pulled. Went with the 3000mhz ram in the end, since that was what was in stock! Saved a few pennies though, and should bring the eventual build to around the £1250 mark.
All but power supply and monitor ordered from OCUK, found the riotoro 650 for £71 from the rainforest, that I get free next day delivery, so that's nice. Now just waiting for that monitor to get released! Should be in the next day or so I guess, the rainforest has them for sale, but a bit more costly than other options, perhaps release will see that drop. Remove delivery costs and they may still be competitive though.
Going to hook it up to a TV once I've got it all built I guess!
Will need to start watching a load of building PC youtube videos now. No doubt I'll be on here in near tears when something isn't working.