I ended up going with 2 XS30s with espresso finish. I've been waiting to give my impressions until they were broken in (whether or not this actually makes a difference, figured I'd give it the benefit of the doubt). I also still need to properly set them up (placement, receiver and amplifier settings). Between being so busy and not having a clue how to do it, I haven't taken the time to mess with it yet. I will say the finish is amazing. I wanted a mahogany color and was worried the espresso would be too dark (based on the samples I was sent) and the other options would be too light and not the right color. After looking at what pictures I could find online of the espresso, I decided to go with it, and I am not disappointed. They look great.
As for the sound, that's harder to judge, for multiple reasons. First, as I said, they're not set up properly yet. Second, my ears are very untrained. On the one hand, the bass seems very good, certainly much better than what I'm used to. Before my friend who came to help me get them inside and unboxed left I played a couple things and we were both impressed, as it sounded and felt more like a theater. On the other hand, I feel kind of like for having 4 15" drivers it's somewhat lacking, especially since to get the bass to a good level I have to turn the gain almost all the way up (currently at 3) and turn up the bass output on the receiver. I watched the train wreck scene in Super 8 a few times and, while it was certainly enjoyable, it wasn't the life-changing experience people refer to it as. Keep in mind, I'm filling a very large space, so I new going into this that it might not be what I expected it to be, but still, I was hoping for more. But that's not to say I'm disappointed or regret my decision. I simply wonder what if, mainly if I had gone vented. I also don't have a clue what kind of bass I'm getting. I don't know if it's all mid-bass or if I'm getting much low/ultra-low bass as well, since I don't really know much about it. It definitely shakes the house (I'm currently trying to find a way to make my shot glasses stay in place in their case, and the glasses in the kitchen move around inside the cabinet), and I can feel the couch shaking a little, but it certainly doesn't punch me in the chest or anything like that. One observation I've made is that the bass seems just as loud and rattling for a lot of basic background bass as it does for bass heavy scenes like in Super 8. Not sure if that means anything. Anyways, this could all change once they're properly set up, which is why I was holding off giving my impressions. I'll have to try and remember to take some pics and post them, so if I don't do that before too long feel free to nudge me to remind me.
Any suggestions or questions are welcome.