Great looking tank, what's the lighting specs? I've been trying to make a green tank out of my mantis tank for a short while now, eventually I'd like to have the 'zen garden' look. I think it's funny how some reefers loath macros in their display while the rest of us try so hard to grow as many as possible.
Where did you get your macros from? Mine are all locals, my Dictyota dichotoma isn't doing so hot. Next on my list is some blue Ochtodes if I can get my hands on it. I didn't plan my substrate very well, so my shoal grass isn't doing well either, that's the plan for the next tank, silt bed with lots of seagrasses. I actually try to promote hair grass for the flowing lawn look, some species look great IMO, as long as they're very green and not the mushy snot colored variety.
You might find you don't even need that filter. My 8gl has only a powerhead, 10lb LR and weekly water changes with ro/di and maintains zero nitrates even though that tank has no macros other than some hitchhiker red turf algae of some sort.
One person I was surprised to see in the RC macro forums, though it really shouldn't have been much of a surprise, is Tom Barr. With as much helpful info as he gives us here. It's funny in some cases, where some people there don't really realize his experience with greenery, so it seems like they think some of the things he says are cookoo, lol. I don't know, maybe he's well known over there too, but that's the impression I got from a few threads.