You used to run a triple headed rig, when did you give it up and do you ever regret it? I've been running it for 8 years and, well, it's hard to let it go
For me the hardcore days of 3-5 display Eyefinity/Surround setups with 4-Way SLI/Crossfire are over. Multiple displays IMO were more of a priority in years past when there was no such thing as high resolution fast refresh display. You were basically forced to use multiple individual displays to create it and needed serious horsepower to do so.
Now with Multi-GPU becoming a fading memory and bezel'less beautiful curved relatively high resolution displays on the market that can be run with a single high-end GPU, for me as I get older it's a no-brainer. On my crazy setups I'd spend more time building them as a hobby and trying to get everything to work than actually plying games.