Have you considered doing a wireless survey and finding out what channel(s) has the least interference in your area? Replacing a perfectly good router with another one if the problem actually lies with broadcast interference is just throwing good money away and not solving anything. If you've got an Android phone, install
WiFi Analyzer to help you get a better grasp on what's going on.
Windows Phone/Desktop tool here, no real equivalent tool for iOS. This is a job that's easier to do on a smartphone, but still doable on a laptop. If either of those links/tools won't work for you...
check here for alternatives.
Do the survey, switch network channels. The problem will likely clear up a bit unless you're just absolutely saturated with other WiFi networks in your area... and if you are, again, buying new equipment isn't going to fix the problem. Honestly, though, always go wired over wireless whenever possible given that possibility for interference if speed is that important. Lastly, even if you can't max out your internet connection from WiFi? It doesn't really matter. Outside of
massive data downloads, you really aren't going to perceive much difference. Even HD streaming video uses less than 1/20th of the available speed with your current ridiculous overkill internet package.
If you find you must
must buy a new router and it's not spectrum interference causing the problem, go with
Ubiquiti UniFi gear. Keep the existing router, turn off the wireless, and plug in a
UniFi AP, or swap out everything with an
airCube ACB-AC. Enterprise grade equipment, simple setup, mid-range consumer-grade pricing.
Unless you need to share internet with other people, just run a cat6 Ethernet cable directly from your modem to your computer, no router required. It's faster, more reliable, more secure, and cheaper. And if you need to share, you can look into a basic switch that supports gigabit Ethernet.
Emphasis added.
More secure? Really? This isn't very good advice. Most routers also have firewall capabilities, and when properly configured, add a lot of protection. I'd rather have my computer behind a network firewall on a local network than swinging wide open on a public IP address hanging directly off the modem. Your suggestion is actually
less secure than sticking it behind a router.
Good idea going wired whenever possible, but bad idea plugging any computer straight into a naked ethernet port coming off the back of a broadband modem.