Interesting question...
Before I get to lenses, I'm going to touch on camera bodies first. I currently run an EOS 7D, having upgraded from a 40D when the former was released. If I had to operate a single camera body [and to heck with the expense] then it has to be the 1DX. My subject of interest include macro work, but also wildlife - particularly raptors (birds of prey) and for that sort of subject I'd be interested in the impressively high frame rate of the 1DX. My only real concern would be the bulk. I've not tried to work with one of Canon's full-frame, extended-body cameras, and I wonder how fatiguing that would be after a day of shooting...
So to lenses. I haven't tried the 100mm L Series Macro that you mention... At the moment my slowly growing collection covers the 16-35 f2.8,24-70 f2.8 (Mk I), 70-200 f2.8 (Mk I) and 100-400 f4.5-5.6 L Lenses... At the moment I'm very interested in trying a 35mm prime, but will wait for the anticipated Mk II to come along before I make the move. And if I could have absolutely anything? Well, I'd cheat, of course! I'd go with the 70-200mm f2.8 Mk II L Series (which by all accounts is absolutely cracking) and I'd perform near-field and closer work with extension tubes...
And now for the blasphemous bit... Having run a Powershot alongside my SLR for a few years (I started with the G9) I've come to love the compact portability and usability of Canon's smallest "serious" camera. I'm currently running a G12 (no current plans to upgrade) and this gets used both in 'round-town' environments such as days when I'm traveling on business and also, in Canon's own water-proof housing, when I'm indulging in some recreational scuba diving. It's stupendous for both tasks. And the blasphemy? Well, I just bought myself a Panasonic DMC-GX1. I was intrigued to see what all the fuss was about. And. Well. Wow.
It came with a stock lens (14-45mm - 24-90mm equivalent for 35mm) that is average, but I augmented with a 20mm f1.7 Panasonic branded lens and an all-manual Voigltander Nokton 25mm f0.95. That Voigltander is so sharp it would make your eyes bleed... Yes, it softens appreciably into the corners when it's wider than about f4.0-f5.6, but it's exquisite to work with. Oh give me something like that for my 7D and I'd be in heaven... These were my first experiences of primes, and I think I'm a convert. Hence the 35mm Mk II L-Series will go on the shopping list!