Depending on what you're looking for (I know that Lu La Roe has a lot of crazy patterns, right?), I'd recommend 90 degrees by reflex from Amazon. I have the yoga pants which are basically long leggings, nice thickness. I am 5'8", size 10 and I have a M that goes all the way past my ankles. I have other leggings by them that are shorter that I use mostly for working out.
Not sure about the whole outfit, but for pants the 90 Degree yoga pants on Amazon are amazing and only $20!
I'm a dude, leggings are pretty much the only thing I wear to yoga class. If you don't like the outline your penis makes when wearing them either wear a dancebelt under the leggings (which has the other advantage of keeping stuff out of the way) or wear shorts over them.
I have done a mix of men's gymnastics tights, men's running tights and "womens" yoga pants. I would reccomend avoiding the running tights. The ones I have have zippers and stuff that get in the way. Both the gymnastic tights and the women's yoga tights work great though. It's all stretchy so the fact that they are "womens" doesn't really matter, they really end up being unisex.