Barleywine, if you are interested in getting a Conver deck, I agree with Sulis. I think the CBD is the best non-fascimile Conver deck available. Conver is however, probably my least favorite TdM style. Unfortunately for me it is also the most prevalent it seems.
Personally, I think the Fournier deck looks better in online scans than in reality. I find it disappointing. The characters just seem so empty and soulless, and the colors on the actual cards are not as nice as they look on the internet. However, if you are ever interested in playing tarot games, it is an excellent game deck, especially when playing with people who are not familiar with tarot cards. The colored backgrounds make it really easy for newbies to distinguish between swords and sticks, for example.
If I had to recommend one and only one TdM deck, it would probably be either J.C. Flornoy's Jean Noblet deck (because I love TdM-I style) or the TdM Robledo (best card stock ever). Both are similar in price though to Yves' deck.
For less costly decks, and based on what you said about liking "true blues" and not lighter blues, and since you are not necessarily interested in a historical reproduction deck, I suggest checking out either the Paul Marteau deck by Grimaud, or the TdM deck by AGMuller.
My Grimaud/Marteau deck is the French edition, so I assume the US version is the same but in English? Not sure. The Grimaud uses dark blue, almost royal blues. The Dusserre/Marteau deck I have uses a light blue color that you would probably like less.
Do you like your wife's Tarot Classic? The AGMuller TdM is the exact same artist (same line drawings) but the coloration is different. Darker colors, including darker blues. This deck can be found very cheaply on eBay (from this seller
http://myworld.ebay.com/california-canuck/ but none are currently listed), but as Sulis can tell you, the card backs are hideous, so if that is important to you, I don't recommend this one.
If you are interested in an affordable reproduction deck, I highly recommend the Piatnik. Nice price here:
http://www.tarobearslair.com/tarot-de-marseille-piatnik.aspx