[Blind-sysadmins] dd-wrt, or tomato USB

Hello, Does anyone have experiences with alternative router firmwares? I've got an Asus RT-N66U and am wanting to put something other than stock or as it stands now the merlin firmware on it. I'm not liking the accessibility. OpenWRT had me until I saw that it's 2.4ghz was weak and 5ghz was unrecognized, for me that kind of defeats the purpose. I suppose my choices are down to Tomato USB or DD-WRT, both of which are supported by my device, but the DD-WRT installation fills me with apprehension. If anyone has experience with either Tomato USB or dd-wrt or has another suggestion please let me know. Thanks. Dave.