Thought I'd put in my two cents since I just bought these. My first impression is that I am very happy with the sound--definitely enough bass and at least to my ears, it sounds pretty clean/tight on tracks with punchy kick drums.
My only complaint is the fit. First of all, the large-sized included tips are the same size, if not smaller, than the medium Shure tips I had on my SE210s. Also, I think my ears are pretty average sized, and I cannot get them to [comfortably] fit over my ears, which is my preferred method. The "post" by the nozzle sticks up too far and the cable just falls over the top of my ear. I'm used to over-the-ear but will give the straight-in method a fair shot... just skeptical that it will give me a tight enough seal to block out the noise on the subway. Fortunately I can return these to J&R in the next two weeks if I can't get a good fit.
Overall I'm very happy with the sound of these since I was looking for a slightly bassy, "fun" earphone and the HJE900s are definitely that. Thanks to Ultrazino for the tip.