I looked at Reef Angel about 8 months ago (give or take, it's been a long year
). From what I've seen and read on the intertubes, the RA seems geared more towards the DIY'er. Other than that, I've seen mostly good reviews on it.
In the end, I think the best thing to do is to write down a list of what you want your controller/monitor to do, then look and see which will perform those functions within your budget.