Biamping 101

Oh, the pain of being a "newby". I hear arguments for biamping and biwiring, but I question how benieficial - and how safe - the methods are over just buying higher-quality equipment.

I own a Hafler DH-500 amp, and will probably acquire another one in a few days unless someone here gives me a great reason not to - and am considering biamping a used set of PSB Stratus Goldi's or Thiel 2.3's.

I've read some postings about using external crossovers to biamp; are there recommendations on a specific crossover to use?

Also, how do I get the signal from the receiver/preamp to two different amps for the mains? I guess an overview of how the wiring should go would be quite helpful.

Thanks for entertaining and educating the newby.

HC