I think that it looks great, Seth!! Both tanks are coming along very, very well and I especially like the system on the right.
I would add some other plants instead of adding sand. It's hard to keep clean and overdone in this hobby in my opinion. Try a foreground of Marselia minuta, or get some of that "true" Sagittaria sibilants that Aaron is selling right now. That would be a nice bright foreground that would probably do well for you!