... so, unfortunately, my Panasonic G2 given up on me (the shutter curtain is stuck closed), but it did served me admirably and heroically in the past 3 years, and I don't know if I will be able to take it for repair. At the moment I have two options : get a low-end camera to satisfy my needs and keep as a back-up latter or get a used camera instead or wait the excruciating long time to upgrade directly to the camera I want. This passed two weeks where hard enough being camera-less because I couldn't/wouldn't get outside of fear that I will get really mad if I know what I missed so many shots (I'm not a freak that takes pictures of everything just that I hate when I see an opportunity passing by). Now enough of my gibberish:
I'm into macro photography and I do a lot of landscapes and I want to get into astrophotography (very slowly because I know it will eat my money like a hungry piranha) so I'm looking for very good high ISO performance (usable to 6400), good DR (at least 12-13 stops) and excellent sharpens for big prints like A3+ and beyond only if it's asked specifically (preferably without AA filter). I would prefer EVF and/or semi or fully articulated LCD for macro and astrophotography.
The only complain that I really had with my Panasonic G2 was the ISO performance, it had the perfect amount of controls/buttons/dials/switches and they were all single function, the awesome balance of weight and size and an EVF + tilt and swivel LCD. But ISO is just horrible because even at base 100 I get grain even with a +20 sharpness in LR 4.3 and at 1600 it just loses most of the DR, colors and details and that's shooting RAW.
I would keep going with Micro Four Thirds but the ISO performance is still very disappointing (even Olympus OM-D E-M5 and Panasonic Lumix DMC-GH3) even though I love the small and light weight advantage and that it meters with all lenses imaginable. And the lack of more native macro lenses like wider (50mm standard) or longer (150-200mm telephoto) without going complete manual mode with adapted lenses.
My second best option is Pentax K because of the impressive IQ (second best in APS-C class) and the build quality (smallest semi-professional DSLR and weather sealing) but still no articulated LCD and the QC and prices of Pentax lenses are troubling to say the least but that astro tracking with GPS is something to rave about. And my first DSLR was an Pentax K200D so it's not strange water for me (it did die from lot's of dead pixels on the CCD sensor, at one point a quarter of my images had white pixels).
My best option is Fujifilm's X-Pro1/X-E1 for the shear best ISO performance (it has lower noise then Nikon D800 and Canon 5D Mark III for duck sakes) and the lack of AA filter give very impressive sharpness with just average DR though. Just to bad for the lack of IBIS (somewhat nagated by the usable ISO even at 12800), no articulated LCD. But I love the idea of shutter and aperture "mechanical" dials like the old DSLR's.
I do consider two other options:
Samsung NX because of the acclaimed sharpness from the 20 MP sensor (but very disappointing ISO performance) and the price for all there lenses is still cheaper then a Nikon D800 with a kit lens. (Thinking of Samsung NX1000 as a travel/back-up compact camera)
I would go for Full Frame (Nikon D600 or Canon 6D) because of the increased DR and ISO performance and the fact that a 50mm f 2.8 would give me as much gathering light and bokeh as a 35mm f 1.4 on APS-C but then I remember that X-Pro1/X-E1 gives me better ISO performance for half the price (if it's X-E1), 2 times less weight and 3 time smaller size. But the again more macro lenses options and those brilliant Canon MP-E 65mm f 2.8 1-5x Macro and Nikon PC-E 45-85mm f 2.8D Macro.
Money would not a be a big issue unless it's over 2500$ with lens because it would be a big wait for me to gather all that money. What would you recommend ?