If you get a mechanical keyboard, 99.99999% chance it's wired.
First thing I would do is get a key tester, like this
http://www.amazon.com/dp/B00AZQKCD4/?tag=neogaf0e-20
This will let you get a feel for the different key types, so you'll be able to pick what key to start with.
From there, you'll want to decide if you want a full keyboard, a tenkeyless, or a 60% board. You'll probably fall either on the full or tenkeyless side to start. Ten keyless is just as it sounds -- there's no numpad, and it makes the keyboard a lot smaller without shrinking actual key sizes. Gives you more room to move your mouse etc.
After you've decided on your key switches and your format, at that point you'll start picking actual keyboards. There's a lot of "other" features like media keys, Fn functions, RGB lighting, lots of stuff. There's a lot out there, so it's hard to make a specific recommendation until we know more about what you want out of it.
Also, there are "Gateron" or "Kailh" switches out there. They aren't quite the top of the line, but they are a LOT cheaper (You'll see boards that are $40 instead of $80), and are 99% of what makes mech keyboards great. I think the only concerns with the "3rd party" keys is longevity and consistency between keys over time. But those are mainly concerns for full on mech keyboard converts.
It was £85 incl shipping to the UK. Should have it by nxt week.
