SMA are the big granddaddy of inverter manufacturers. Founded way back in 1981 they are based out of Germany, turn over billions and employ about 5000 people.
They make fantastic inverters in their German factories which are renowned throughout the solar industry for their reliability. Many would say that they are the best inverters you can buy.
If you want a safe bet, you can't go wrong with an SMA. The only downside is that you tend to pay a premium for them.
(If you want an SMA backed inverter for a lot less cash, you may want to consider a ZeverSolar inverter. They are a budget Chinese brand that is 80% owned by SMA)
SMA Inverters have a strong local presence in America in the rare event that you have a warranty issue.