Sounds good. 10k will be whiter, 14k mid blue, 20k most blue.
Growth rates are better the closer to 10k. A good scenario would be the 10k with some blue actnics. I went with 14k MH w/o actnics and I personally like it. Plus later on I could always buy 10k bulbs and some t-5's.
Good start from my wallets standpoint.