Mine went dead after about 8 years of use, and really 11G is a bit slow these days when multiple devices started streaming. I wish Linksys can have a reasonably priced 11N version that can load open source code to continue this legacy.
Not sure about the 1200, but I have the WRT610N and it has never worked completely with Open/DD-WRT. The best I got (before leaving it and returning to the original firmware) was a functional router but no USB and no 5GHz band.
The wireless driver is crap, though. The last time I checked it wasn't recommended due to wireless problems.
But the number of devices connecting and the bandwidth they require are only increasing, and 802.11n or 802.11ac would really help with some of them. I also have desire for a relatively inexpensive wireless router that does not attempt to prevent me from loading on it whatever software that pleases me to run. I will not pay a full purchase price for any device that I cannot own.
That doesn't necessarily mean I won't ever have such a device; it just means there has to be some way to jailbreak it before I will consider buying.