stay clear of razer mechanical keyboards they are junk compared to even the most basic mechanical keyboards.
the k60 and m60 are good choices if you like branding. they will look very smart together on your desk. function wise they will both do the job better than razer although there are better options available. how much are you looking to spend for each.
you see the kit i use? its supposedly some of the best but really does it help my gaming. not really.
my recommendation is get a basic mechanical keyboard that does keyboard things well. things like light keypresses, antighosting/Nkey roll over. although mechanical keys can take some getting used to and are noisy they do offer better response. if your coming from a rubber dome key then a black cherry key will feel great while red with feel very light.
Nkey roll over is the amount of keys you can press at the same time. you want a keyboard with a minimum of 6, recomended 10, best full, Nkey roll over/ full antighost where you can press any key combo on the keyboard and it will register. the reason i say stay well clear of razor is because of the poor 3-6key roll over... they claim the wasd keys are optimized which they are but only in respect to the other keys on the keyboard. compared to other keyboards they are bugged and bugged badly.
you press any combo of crtl and wasd the keys will register but then hit f,g,h or any other key while holding the first 1s down they wont register because razer got it wrong and spectacularly so(typical razer all bells and whistles but no tune). they claim its gamer optimized but forgot that some games require more than 4 keys to be pressed at the same time. tekken for instance can have up to 9 simultaneous keypress's. while a very good keyboard will allow you to have 2 players playing on 1 keyboard at the same time using up to 20 keys at 1s... yeah i know not many games will allow that, but its nice to have it and not need it than need it and not have it.