$99 KS is a great deal. Device ownership costs more upfront, but cheaper long term. There's really three options for you:
1. $99 + $120/year (not $149). First year is free.
2. $99 + $79 (upgrade) + $49/year. First year is free. We included 6 months additional service with this offer.
3. Return $99 device, pay $200 up front + $49/year. First year is free. This is basically #2, but more expensive, and no 6 months free.