At night during a show I think you could have white wire and no one would notice. We are our own worst critics / skeptics. In reality, the viewers never notice the little errors in sequencing or occasional glitch, nor do they care. The viewers just smile and go away happy which is all we really need. So enjoy the show and don't overthink it. As your show gets bigger and bigger you will begin to appreciate every little thing that makes putting it all together easier whether that is hardware or software.
I know what you mean.
My situation is a little different perhaps. For 2012 I will be starting from a completely 100% clean slate.
I am maybe straying away from the traditional christmas lights, and doing instead a christmas lightshow.
At the moment I am planning 100% RGB pixel strings, a couple of large mega trees, and lots of mini trees, the building outline and perhaps a few reindeer. I have visions of being able to scroll 'Merrry Christmas' across 3 megatrees at the front
It will be interesting to see what happens hardware wise in the next 12 months. If you are starting from scratch, and bearing in mind we in the UK do not have access to the cheap light sales you do across the pond, I do not think there is much difference in the cost between RGB pixels and controller and normal LED strings + controller.
But I guess I can stop worryign about the wire colour. Though I would prefer it if they were nice black twisted rubber cable!