I think the G.Skills Ripjaws is one of the few 1600 DDR3 out there right now that's got both low latency and low voltage - so it's been a popular choices around here the past couple of weeks.
In addition, it's heat-spreader doesn't extend the height quite as much as some of the others. Here's one of my infamous graphics showing it along with normal RAM, OCZ Blade and other G.Skill models. This is DDR2 which is the same height as DDR3 - handy for seeing if it'll get in way of a CPU cooler - the G.Skill Pi (silver) is 55mm's high, un-sheilded 30mms.