My brother just bought a Logitech G110, which I've had a quick go on. It's a nice keyboard. It feels a little light, but they haven't done anything silly with the layout, it's fairly nice to type on, and the back lit keys are pretty, but they do feel a little odd to me after spending the past week or so getting used to a SteelSeries 7G.
I'm not entirely sure what colour switches the Razer uses (I refuse to buy Razer products) but the 7G definitely uses black switches. I even popped a few keys off to have a look at them.
I enjoy typing on the 7G (even though some people don't), and it's superb for games. After a few days of using the 7G I seem to do much better in Lead & Gold. On my old keyboard (an aging Microsoft Comfort Curve thing, £12 in Asda

) I was getting 20-ish kills and 5 - 10 deaths on a good round, but since having the 7G I've had a few rounds of almost 50 kills and no more than 10 deaths or so, however this could all be coincidence... or luck
I'd recommend anyone at least try a mechanical keyboard if you have the money, and you can always DSR it if you don't like it. For a budget keyboard I've heard good things about the Saitek Cyborg V5.