Suggestions for new modem and router

Networking Networking Hardware
1

hello internet, once again i must ask for your mystical knowledge for finding a new modem and router. here are some of my requirements and info that you might need to know

  •  the modem has to be DOCSIS 3.0
  • My ISP is Mediacom and i am getting 100Mbps 
  • we have a pretty big house so it has to cover quite a bit
  • i would prefer it to have external antennas just so i can change the antennas if i feel like doing so
  • none of the devices that connect to the net have AC capabilities
  • it has to be under $200 total

 

2

I don't have personal experience with this router so I'm not exactly sure its effective range but I do have this modem and it's actually quite good.

Modem: http://www.amazon.com/ARRIS-Motorola-SB6121-SURFboard-DOCSIS/dp/B004XC6GJ0/ref=sr_1_1?ie=UTF8&qid=1415928619&sr=8-1&keywords=motorola+surfboard

Router: http://www.amazon.com/dp/B00387G6R8/ref=wl_it_dp_o_pd_nS_ttl?_encoding=UTF8&colid=1G945JXTBHMB7&coliid=I2A6WILDOP2M88

3

If you've got an old computer lying around, make a pfsense box, get a cheapo switch with a few gigabit ports and a unifi ap?

4

^^^^ this^^^^

5

the only problem i see with that router is it is not dual band =\