I don't have a desk big enough for 3 identical displays, let alone 3 with a set of monitors. EDIT:My screen takes up 70cm of space horizontally, and the two speakers either side take up around 35cm each when toed in.
Depends on your motherboard generation as well. Waaaaay more options on a LGA2011 X99 (was confusing when I went to setup a friends PC) compared to my old LGA1155 P67. But then, I think 1155 was right when motherboard manufacturers were making the switch from old style BIOS to UEFI on mainstream boards.
There's more stuff to check in an X99 platform, mostly the DRAM check. You can probably shave 4-6 seconds off buy disabling or reordering the POST sequence of various controllers in the BIOS. I don't think it's worth the effort though to be honest.