LED lighting advice before purchase

[-Az-]

hi all

great forum. I think i've interpreted everything right so
this post is more for clarification before purchase then anything.

i'm a freshy with planted tanks and native australian fish, I've decided to start updating my fluros to LEDs.
my trial tank is 1200x450x700 (47x17x27) - 378L (108g)

here is what I'm planning;

heatsink- makers 36in - great product, well done
LEDs- Cree 14x 3up(2rb/1nw) 40 deg optics
Cree 8x 3up(3cw) 40 deg optics
exotic 3x hv 60 deg optics
exotic 3x dr 60 deg optics
? 3x cb 120 deg optics
power supply - 12v 6a - I'll source local so I don't need an adaptor
- query - as long as I cover the required current with
1a buffer. I don't need to worry about VAC
drivers- inventronics 1x 25w/700ma
inventronics 1x 40w/450ma
inventronics 5x 40w/700ma
controller - dim4 sunrise/sunset - query- is there a limit to the number of
drivers I can connect per channel
relays - 2x relays & sockets to run fans

now for the led setup

ch1- 2x (40w/700ma---4x 3up(2rb/1nw))
ch2- 40w/450ma---3x hv, 3x dr, 2x 3 up(2rb/1nw)
ch3- 3x (40w/700ma--- 4x 3up(3cw)
ch4- 25w/700ma---2x cb

i've chosen the channels to give me control over whites, blue/whites, colours &
moonlights separately.
from my calculations this should be much more than needed for plant growth, but I'd rather have more and be able to dim ( & leave the opportunity open to become a reefy with the addition of a few LEDs and some salt)

I'd appreciate any comments or thoughts
cheers
az