My tank is ND and got to be honest they are great
Really good finish on the tank and the cabinet is simple enough and all holes for the filters etc are coated in silicon to prevent it getting damp.
The delivery was good as well the guy helped get it into place and it was pretty simple to get going with.
Only issue I had with mine was that one of the feet was missing at the front - the tanks 6 foot long and has 5 feet along the front one at each end one in the middle and two in between each. And it was one of the ones in between that was missing, the wood sagged a little but I managed to wedge it up over a few days and got the foot under and it has been fine since.
With regards the optiwhite, its personal choice really. Im not that into them but I know others are, simply put if you think you could regret it get it if you cant imagine being that bothered dont bother. I have the standard glass and no complaints the fish are bright and show well under the lights. The other thing to think of is if it gets scratched would you be a bit gutted?
Wills