A little food for thought. Here is a force graph for a bunch of different switches:
From the
Topre wiki page
What you will note is how sharp the tactile bump is in the Buckling Spring (purple line) and that is what really make it unique. It also makes it a very satisfying typing experience.
On the other end you have the Topre(lite blue line) with a shallow tactile point but with a very smooth action. For me it is that smoothness and the fact that you don't have to bottom it out for a key to register that make it unique. And lets not forget the build quality you are going to get when buying a Realforce board.
In the middle you have the Cherry brown(brown line) and the very first thing I notice is how rough the force graph is for it. After typing on both a BS board (Model M space saver) and a Topre (a bunch of them) the browns are not really a satisfying typing experience for me. Don't get me wrong they are OK but just not great.
Personally I prefer the Topre/Realforce over a BS but just barely then the browns. If I had to pick another click switch it would be white Alps. The blue cherry switches produce a click that is to high of a pitch that just gets on my nerves over time. The Black Alps loose out just because I already have a quite board in either the Topre or the browns.
Any ways just my 2 cents.
EDIT: Forgot to recommend which to get. Well I'm very biased and prefer the Topre but in all reality it is up to you. All I can do is try to supply information to help you make that decision for yourself. But contrary to what others have said if you need a quite board stay away from the blues.