JLC is a great brand, for the price you pay, you get unbeatable quality. Their movements (all of which are in-house), are of great quality. The fact that they having been doing things in-house for so long (pretty much since day one) is why they are, comparatively, lower in price than IWC's, AP's, VC's, etc. They do not have to pay nearly as much for the R&D and other capital intensive projects to begin making in-house movements (such as newcomers in the in-house game like Panerai, Cartier, Roger Dubuis, etc.), just because the investment was made ages ago. They even made movements for Cartier, Vacheron Constantin, Audemars Piguet, the list just goes on. In my opinion, go with the Jaeger, they are a piece of great art. I believe they deserve much more respect (although they get a GREAT deal), they belong in everyone's top three list.
However, I didn't mean to ramble. The Master Calendar is a great watch, the pre-owned JLC perpetual is a gem as well. Too bad the Master Eight Day perpetual is so expensive. Have you looked at the Master Chrono, or Master World Geographic (if worldtimers are of interest)? The master compressor line also offers an awesome line up, if you are looking for a more sporty rustic look. Reversos as well. The Master Ultra Thin Moon, see pictures above, is also great.
Franck Muller is a great brand, their movements are a lot of ETA's, etc. however, they have came a long way with in-house innovations, especially with the most recent in-house chronograph and automatic movements. However, if I were putting out the money for a FM I would buy one with an in-house movement, and since those are so expensive, I would fall back to the Jaeger (I DO NOT mean that in a bad way).
Ulysse Nardin is kind of the same. UN is the home to many watchmaking firsts (thanks to Dr. Ludwig), but their maxi-marines are more of a pretty face, in my opinion.
So, I guess to me, all roads lead to Jaeger-LeCoultre. A great brand, with great history. Good luck saving up for the Lange, another great brand with rich history, just a tad out of my (and I think almost anyones) price range!
Good Luck with your purchase, post some pictures once you make your decision!