I am interested in the 5146 Annual Calendar in white gold with gray dial and black strap. I know prices are going up May 1 so need to make decision quick. Curious to hear about people experiences with teh 5146 and about the annual calendars in general. I have a couple of perpetuals from other brands (JLC and UN) and would love a PP perpetual but they are a little bit out of range, so am thinking of the annual calendar. Any thoughts or advice would be appreciated. I imagine that with all Patek's it will hold its value and then some over the years. Thanks.