That Cheery 1ms input lag doesn't really do anything. Humans can't detect 1ms vs 20ms. You would have to be superman typing to pick up the difference.
Also Cherry are more of an industrial dustproof waterproof keyboard manufacturer. Purchase a GE MRI machine for a million dollars and it comes with a Cherry keyboard. Can't have an MRI down because a tech spilled a cup of coffee on the keyboard

But for gaming they are one of the last manufacturers you look at.
What I look for in a keyboard is a full layout with numberpad and the usual 4 arrow/cursor keys and the 2x3 layout for ins/home/end/del/pgup/pg down. Some keyboards have a bit more compact layout with the cursors and home/del/etc... layout. I hate this. It fells like you're on a laptop and everything is too compact. Some people look for a keyboard without a numbpad since they find regular layouts are too big and take up too much desk space. I use the calculator and spreadsheets so I want the numbpad.
Only you can decide what keyboard is comfortable for you. I like the natural curved keyboards. Some hate them. Backlighting is a must. I prefer wired since there are no batteries to change or die midwway through a game. Some love wireless and hate tugging on wires. The wrist rest design will play a part in comfort. You know those feet that fold out to tilt the keyboard that always break? Steelseries uses rubber pads that snap on so they can't break and they hold the keyboard in place. It comes with different heights and you use the ones you want. Brilliant.
All gaming boards will have some macros and anti ghosting so that is a non issue. When it comes to mechanical you have to try the different switches like cherry red, black, brown, etc... to see which you prefer. Some companies are making their own switches now like Steelseries and Logitech and supposedly are very good. And some membrane keyboards are being made more durable like the logitech with 25million keystroke membrane or whatever it is.
When it comes to brands every single manufacturer is into the keyboard/mouse game. It's ridiculous. Asus, Corsair, OCZ, Zalman, GSkill, Coolermaster, Logitech, Microsoft, Razer, Roccat, etc.... Go on newegg and you'll see 50 manufacturers of gaming keyboards. Yes the mechanical switches last, but sometimes the electronics in the keyboard fail and I've seen my share of reliability issues even with mechanical keyboards. Razer seems to be the most popular with their neat designs and advertising, but they also have their share of reliability issues. Right now I'm gonna say that Steelseries has the best designs and best reliability and their prices are damn right acceptable. The Apex keyboard for $39 and the Mouse for $39. Can't beat that for entry level gaming and they are quite nice. Also after going through all the forums, I find thousands of people agreeing. Steelseries is building quite the reputation and becoming more well known.