My SB5100 has ran without an issue for 5+ years.
I paid $59.99(after rebate) for it.
$3.00 per month x 5 years = $180
180 - $60 = $130 net saved.
So, with a starting point of $130, $200 is not that far of a leap.
No one has a timeline on when we can go to Best buy and pick up a Cisco or Moto D3 modem.
I will likely have enough to get one by the time D3 gets here
and D3 modems go on sale.
Rent one, and the modem runs for years... it's like burning money.