which PCR machine?

[Ludla]

If you are considering the PE "Taq-Man" assay, be advised that you must have
 specifically designed probes for the system.  This means you must know, in
 advance, the sequence of your target, design the probes which will require
 both a fluorophor and quencher molecule on the probe.

The assay works because the quencher proximity to the fluorphor prevents
 (within reason) fluorescence UNTIL the Taq digests the probe off the target as
 it extends the new strand.

Needless to say, as with all things, there are drawbacks:  background must be
 accounted for, probe costs can be significant, co-optimization of probe
 binding and primer binding must be determined, etc.

This is not meant to discourage, but to enlighten!  Remember always that
 Marketing can make it sound EASY AS FALLING OFF A LOG!

Good luck!