That is fine. I'd suggest Blue+ from ATI, also 6 bulbs may be a little intense. The more 6500's you have the browner and yellower everything will look. I'm using 2 Aquablue (12000k), 2 Blue+, and a Fiji Purple with pretty nice growth over my 100g. Keep in mind plants use blue spectrum to photosynthesize so blue bulbs help growth as well.
Try a couple of 6500's and mix some 10k bulbs and blue/actinic for a nice look. I don't like the look of even one 6500 added to that mix I have because it's so yellow. I have two GE daylights sitting unused next to my tank in favor of cooler bulbs.
Mix and match to see what you like. I think you'll probably end up sticking with just one 6500 because you'll see all the others have to balance it out to provide a more pleasing look.