Maybe I should just continue to borrow computers for photo work and save up for a 2009 Mac Pro.
We're running 2 x 2009 Quad core Mac Pro's here that have been upgraded with 3.33ghz Hex Core processors. 32gb Ram, 2 x GT 120 video cards driving 2 x 2560 monitors and a 720p tv. Upgraded SSD system drives make a big difference.
Still work great on El Capitan using Logic X with large projects. Still, id be looking for even newer if i needed a system, but i guess price is a big factor for you.