Well, the only downside I see is that all 4 only support 100mbps LANs, so if you're not concerned with large file transfers over the wire they're all okay. I'd probably go with the ASUS, 2 x 5db antennas will do a lot for your range, but if you're in an apartment this actually turns into a con... and if you don't like white...
Are your devices n compatible? What's on a wire and what isn't, and what may come in the future? Remember that n is a flexible wireless technology, it operates at 150/300/450/600 depending on the number of antennae, there are some awesome (expensive) routers available, but you also need some awesome (expensive) NICs to fully utilize it.