Buyers Agent Contract..yes or no?

[Brock Mogensen]

I am currently on the look out for apartment deals and am beginning to interview brokers and lenders.  I've interviewed a number of brokers and have come across two that I like especially.  They both have mentioned that I should sign a buyers contract with them in order to (in short) increase my chances of them locating a deal for me.

I haven't found to much information on the BP forums about people's experiences with a buyers agent contract and I'm curious if anyone can share some insight.

Also, would it be allowed to sign a buyers agent contract with both of them?  Or does it have to be exclusive?