I'm not terribly fond of the points spread as they're listed here. We play 1850 or (more often) 2000, where as 2500 basically never gets played outside of the occasional tag match. 2000 to me fits into the range of "standard" 40k, with plenty of tournaments falling in to that range as well, while 2500 falls into that awkward gap between a "standard" game and Apoc, and really doesn't tend to see much one-on-one play in my experience.