Dual CPU Mobo for Xeon E5-1650

I have not seen (nor heard of) a dual i7 machine. Think you are stuck with Xeon (which isn't bad really). As far as server motherboards, there are a lot of them and I personally wouldn't know how to narrow them down - here's a list of what NewEgg has as far as dual intel CPU mobos. I am sure it is not all inclusive but it is a start (some of these boards are rediculous!)
http://www.newegg.com/Product/ProductList.aspx?Submit=P...

Looking at Dual LGA 2011 boards:
http://www.newegg.com/Product/ProductList.aspx?Submit=E...
they all list CPU type as Dual Intel Xeon E5-2600 Series. Will E5-1650 work with these?

The E5-1650 is a single socket processor. You need an E5-26xx series for dual sockets. They have a second QPI to communicate between them and of course are more expensive.

I do not know about consumer intel CPUs but Robohare is right, Xeon e5-16xx series is mono-socket oriented, basically they do not QPI link as xeon e5-26xx series do. Though xeon e5-16xx CPUs are robusts in many ways and am not so sure you need multi socketed motherboard for what you do?
Are you sure dynamic modeling on your software is only CPU and/or CPU cores intensive or does it require memory and memory bandwith as well as GPU Open GL or DirectX for calculation? I would advise to research about the program you use to make the best/speediest/smoothest dynamic calculation cruncher system and if the only focus is to be CPU oriented then go ahead with xeon 26xx series