There is not really "the best specs that money can buy", you could add 2 more SSDs to that and 2 more monitors and more RAM. That is a pretty insane computer though, but there are some parts that could be changed to make it cheaper and the same speed.
Best specs is a little subjective, hard drive space is a luxury, you can have as much as you want to spend money on, monitors always come in "more and bigger" varities, they also aren't really a spec. RAM is about limited to the biggest motherboard you can get, along with the CPU. I mean really you can strap 4 video cards too, there's so many varieties and different specializations of things that it is hard to say anything is "best."