Ok, even though I am still running them, do not be tempted by a set of Marz 55's up front. You want to spend more time on the trails and less time waiting for replacement parts!

Current favourites would seem to be Lyrics or get yourself something from Fox with a 36 at the end

The rest of your kit sounds spot on for an initial build, just upgrade it if you need to in the future.
I'm not sure how to convert the Hope hubs, but you should have the drop outs to take a 12mm bolt thru?
Either way the 666 does benefit from a stiffer rear end.
Now get building and get the best bike in the range* out on the trails

Tim S
*My biased view obviously