There are many different routers marketed under the "Nighthawk" line. Don't buy one simply because it has the name "Nighthawk" in it.
The router I linked, the Netgear R6400 AC1750
is almost the same as the more expensive Netgear R7000 Nighthawk AC1900
- which itself should not be confused with the Netgear EX7000 AC1900 Nighthawk
or the Netgear AC1900 Nighthawk
The R6400 has all of the features the R7000 has. It has the same range and ability, it just runs on slightly older hardware that will be relevant for just as long as the R7000. Furthermore, the R6400 actually supports DD-WRT firmware, while the R7000 DD-WRT firmware has been plagued with development issues for over a year, and might not ever be finished
If you're really looking to go big in the home router setup, you can grab a Netgear AC3200 Nighthawk
for almost twice the price of the R6400. It will feature greater range and should remain relevant longer, but it won't be relevant for twice as long. It also does not have DD-WRT firmware in development.
My recommendation remains the R6400 by Netgear if you're looking for top-shelf performance but aren't in the habit of throwing money away. Furthermore, these routers will come with a Cat 5e or Cat 6 cable, Cat 5 cables are obsolete and haven't been shipping with premium routers like these for quite some time. A Cat 5e cable can handle a gigabit connection, which should be more than enough for anyone with even the fastest home network. A Cat 5e cable that ships with the router will perform just as well as boutique Cat 5e cable, and there is no reason for you to throw money away.
If you are going to buy new ethernet cables in case you just need more of them or longer ones, normal Cat 6 cables aren't much more expensive than Cat 5e cables, so you may as well go with Cat 6. Monoprice
is a great place to buy these, along with any other cables you may ever need.