Check to see which microchip is also being used.
Home Again - 1) cost of chip 2) registration (one time - and NO FURTHER fees for changing your information....ie: phone number, address, contact people, etc).
Avid - 1) cost of chip & registration is generally included in one price (pre-paid registration that the vet has already paid for) .....but the catch is ANYTIME you want to change ONE thing, they will charge you again. (right now, its $15 for everytime you need to change even a phone number).
Me personally, I won't use Avid.
Another avenue....keep an eye out with your local boxer rescue group....I know we have microchip clinics as a fund-raiser, and we do the microchipping at a reduced rate.
