I feel the meter socket TVSS (in the 2008 NEC its a SPD)is an excellent product. Its diverts the surge before it enters the house, and has zero lead length. Doubling the lead length doubles the impedance.
With TVSS, you get what you pay for. More is better.
Install another TVSS at the panel and then point of use protectors. The point of use protectors use the impedance of the building wiring to reduce the surge.