Looking at the DxO sensor rating
, there seems to be a lack of non-DSLR cameras in the upper range with an overall score of 80
or above, which is already met by entry-level DSLRs such as Nikon's D3200/D5100.
The only exception is the Sony NEX-7 which is APS-C as well (score 81), while the Fuji X-Pro1, X-E1 and the Leica X2 have not been rated so far, whereas the results with some m4/3 cameras can be seen as disappointing. Olympus E-PL5 may reach a 72, however, Panasonic has fallen behind, for example with a GX1 or G5 just reaching a score of 55 and 61, which is below or equal to top compact cameras such as the Sony RX-100 (1" sensor, score 66) or the Canon G1X (1.5" sensor, score 60).
There seems to be room for a Panasonic GX2 or a Canon G2X with a better sensor,
or a Sony RX-10 with a somewhat larger sensor, or a Leica X2 zoom.
As for this year, some of my Christmas bonus will more likely be invested in DSLR lenses,
rather than buying into Mirrorless gear.