I suspect new equipment is available since the most recent thread I found on this subject so ...

I need to couple and amplify X-10 signals in my home which has the following characteristics.
- 4500 Sq ft.
- 400 amp service (Two 200 AMP panels)
- Whole house surge suppressor in each panel

What coupler/amplifier is the best for my situation? Do I need one in each panel? (The panels are both fed from the same meter base as is typical.)

Thanks for any help.