If you can try the different switches, you should be able to decide. Possibly you should go to WASDkeyboards and order some different keyswitches, it'll cost you up to $10 max and you can see what the difference feels like between keys before you buy one. That is, if you're really concerned. But if you want to save that extra $10 and go with your gut feeling, just go for it!
I got to masters 1v1 on NA with a crappy logitech k200 rubber dome keyboard, it'll just enhance your experience while playing, a more satisfying, higher quality feel when you hit the keys. I have felt my friends cherry blue's on a blackwidow and leopold, and my brothers shine II, and my browns on my filco. I personally like browns, and i prefer it to blues (cherry blue lovers please refrain from killing me).