G'day Ng,
Are you able to get caesar stone instead of granite? I can only tell you based on prices in Australia, that's it's a little dearer in price, but is a hell of a lot better a product than granite.
It's a nice finish, looks similar in a sense (I like it better), and healthy than granite. It does not absorb any of the bacteria's that granite can. I've spoken to cabinet makers here, and they recommend it, and prefer to install it for the above reasons, not just because it's a little extra in cost.
As for your Ro/Di units, I can't believe you have to cut in your own tee's. Geez we get it good here in Australia
Mine comes already to go. When photobucket comes back online, I'll post a pic for you.
Cheers
Chris