Yea don't get a Razer Blackwidow as a mechanical keyboard. There are plenty of great mechanical keyboards for cheaper. Maxkeyboards have their BF sale going on. You can get a cheap CM Storm Mech board for around $50-60 after rebate. If you're looking into macro keys included with the board the Corsair k90, k70 (maybe k60 or k65) should have some sales going on. There's a whole world out their for mechanical keyboards.
This might be a little dated but worth a look.http://www.reddit.com/r/MechanicalKeyboards/wiki/buying_guide