New
#11
How about this one?
ASUS - - ASUS P9X79 WS
It's an X79 desktop board, but in addition to the desktop LGA2011 CPUs, it also accepts Xeons. You could use an 8 core (16 logical core, with hyperthreading) CPU. The least expensive of those list for over $1k, but you asked about a dream system, not a good one.