15 AMP or 20 AMP Power Conditioner.

Hello,
Which one should I get, 15 or 20 amp PC, to run Cary Audio CAD 211 FE and Cary SLP98, with VPI TT?
What about Furman 15 amp and 20 amp, are they good for high end stereo system?
Any feedback, please post.
Cheer.
KD