I'm averaging about 350 down and 275 up with the ping average of 7. This is from my iPad Pro. My laptop is also around these speeds. I just don't know what to do with all the extra time I have now that I have super fast internet (section 4)!!! I need another hobby 
That's part of my philosophy as well -- now that Frontier isn't a bottleneck, I can go totally nuts and put together and optimize things like crazy, or I can say "perfect is the enemy of good enough" and stop there.
If I was going for maximum performance, I'd start wiring up more rooms. I have a crawl space and a spool of CAT6 wire and I know how to use a crimping tool. I'd probably get a couple of commercial access points and run a fancy controller to make it all seamless, but I've got the training and experience. It'd be wicked fast, and I'd never max it out.
For LynnC, I think she'd do great with one of the mesh wireless routers. Wes said nice things about the one from Google <https://www.amazon.com/Google-Wifi-system-set-replacement/dp/B01MAW2294/ref=sr_1_3?s=electronics&ie=UTF8&qid=1514655431&sr=1-3&keywords=google+wifi+mesh> as being easy for anyone to set up.
A mesh is slower because the stations in the rest of the house use WiFi to get back to the base, but we've still got speed to burn. That'd be way faster than what Lynn has now.