IMHO, yes, and will power them as well as any other receiver at that price point.
The power for the majority of a/v receivers are rated with only 2 channels being used, so when using 5 or 7, the ouput per channel will be less. The problem is that some drop in power much more than others. The SR5010 is replacing the SR5009, and both likely have the same amplifier section with some other features being updated. Here are measurements for the SR5009,
http://www.soundandvision.com/content/marantz-sr5009-av-receiver-review-test-bench#igvWdDSZH5RyTsYf.97
Rated @ 100w, measured 111.7w - 2 channels, 72.9w - 5 channels, 68.5w - 7 channels
Another poster seem to think HK was more reliable with their rating. So, look at this HK receiver at roughly the same price point,
http://www.soundandvision.com/content/harmankardon-avr-3700-av-receiver-test-bench#83IsGPgvYtsDGWwk.97
Rated @ 125w, measured 151w - 2 channels, 37.2w - 5 channels, 27.9w - 7 channels
Sorry, I'll pass on the HK. It is true that NAD does have a more reliable rating, and their receiver at this price point is rated at 60w/ch with all 7 channels.
Now, are there any better a/v receivers, absolutely, but at a much greater expense. Again IMHO, the SR5010 looks like an excellent choice for it's price point. The SR5009 got a great review, and it appears the SR5010 is just a more updated version of that receiver.