inverter sizing: drawbacks to using higher AC wattage inverter?

[mixedpixel]

Hello,
I am comparing my options for inverters for a grid-tie PV system using 10 230 W panels. This DC wattage would seem to call for an inverter rated for 2000 W AC or higher. Fronius and PV Powered make 2000 W AC inverters, but two of the manufacturers that seem to be frequently recommended in this forum (SMA and Xantrex) seem to start out at 2800 W AC or higher. My question: are there any drawbacks to having the DC wattage at the lower end of the rated capacity for an inverter? For example, using a 2300 W DC panel array with a Sunny Boy 3000? I understand that there will be a cost difference between inverters rated for lower or higher wattage, but are there also efficiency concerns?
Thanks!

[Sunking]

No problem at all and leaves a little room for expansion later down the road.

[mixedpixel]

Thanks. I don't anticipate adding on more panels in the near future, but it is something to consider.

A related question: does the rated efficiency of a higher wattage inverter apply at the lower end of its capacity? For example, comparing a 3000 W AC inverqer with a 95% CEC efficiency to a 2000 W AC inverter with a 92% CEC efficiency. If both were hooked up to the same 2300 W DC panel array, would I expect more production out of the higher rated inverter?

[Sunking]

In theory yes, but you are going to have to look at the power efficiency curves of each to really know the truth. Inverter efficiency is usually rated at maximum capacity. Efficiency drops as you go down. So you are going to have to compare the two to answer your question. However I doubt there is enough difference to make squat. Your installation contractor should be able to answer your questions.