I'm considering purchasing a yellow gold Patek 5117. The alternative choice is a rose gold Vacheron Retrograde 47245. I've received some fairly positive feedback on the Vacheron but not much feedback at all on the Patek 5117. I would appreciate any insights relative to the Patek 5117 (or Vacheron for that matter) relating to quality, dependability or after-sale service. Many Thanks.