http://thecubicle.us/moyu-aolong-p-3201.html. I think you should go with the moyu aolong v2 (link). My first cube was a dayan zanchi and I like the feel of mine more than any other cube. Unfortunetly mine popped a lot to and had pretty crappy corner cutting unless I tightened it but then the turning resistance was just too much. So at the Indiana 2014 I tried a few cubes and out of all of them the aolong stood out, It was fast, unpoppable, corner cut like a dream, and the turning of the cube felt the best after comparing it to my dayan. So I bought one and I love it. Most people tell you not to buy faster cubes until you reach sub 20 because they are too uncontrollable but with my aolong this just isn't the case, its very controllable but also goes plenty faster than I need it to and I average around 18 seconds and have a tps of 12ish (I timed my self doing (R U R' U') 25 times to find my highest tps)
***(The first batch that they shipped was made with the wrong plastic and those were sluggish. If you do decide to buy one make sure its from the newer batches with te correct plastic, the link I gave you sells them but if you buy elsewhere just check to see if its a good one. This is also the source of many bad reviews so check for a "this is from the new batch" before using that review to consider buying one)