I took a look at your account and it looks like your modem is syncing up at around 13Mbp/s and it's only over the wireless connection that your devices are getting 1Mbp/s. While I don't think the upgrade to X2 would directly correct this problem, the 5Ghz router we provide with the service would. If you were still willing to give us a shot, that's something we could send you without the upgrade to X2 for like $3 more a month. Whether this would fix the issue would depend on whether your devices have adapters that support 5Ghz. If you have any questions or would like any help with this, please feel free to shoot me a PM here on the forums.
That's an odd one, because 2.4ghz 802.11N should deliver the 13Mbps over a longer reach than 5ghz would, so I don't think that a move to WiFi-AC is likely going to improve thing. I wonder why the WiFi-N device(s) are not getting the full speed..? Interference, bad router, client driver or hardware issue, etc?