Dear Friend ,
I am still using my Sony,Minolta, Nikon,Lumix Mamiya ,Hasseblad,Leaf and Canon.
My advice is to stick to Sony in terms of picture quality and lens build.
Canon is famous as a sports tool ,where else Sony /Minolta is more to Picture quality but not in focusing speed .
Sony's lens is always No.1 then follow by Nikon lens .
Nikon (Nippon Kokagu ) use to OEM lens for Canon in the early days of B/W.
Sony/Minolta has invented a lot of new technoolgy that incorporate with the camera during their days in film and today's digital age.
I am still using my Nikon d3s,d300s,d3x,d700(selling away soon ) d7000 with all Nikkor lenses and CZ ZF 2 lenses Manual too.
Sony /Minolta 7D ,Dynax 9,Dynax 7 ,A850 .A900,A700,A350 Sony DSC-R1 with all CZ ,Sony and Minolta lenses.
Canon EOS 1 MK3 ,EOS 5 MLK2 ,EOS 7 ,S90 ,G10 ,G12.
Lumix L1,L10 ,G1 and LX5 with leica lenses and Lumix lenses .
OLympus EP-1,Ep-2 and soon the New E-5 in my dry box with all new Zuiko lenses.
And so on Too many in my dry Box .LOL!!!!!!!!!!!!!!!!!!! crazy Old man but young at heart !!PPL call me "RED" meaning Retired and Desperate.
I do not only keep this cameras & lenses but I use it everyday each day of my life .As every individual Manufacturer has their own specs and color profile for their DSLR.
Remember the sensor is very crucial and the processing firmware inside is as crucial as how it control the noise and the CA of the sensor.
And last the Raw processing software is one of the most important part and what brand you use is also crucial too.
Always remember you can own a superb camera and lens that does not mean you will get very good photos processing .
Your PC(Workstation ) or Mac( Minimum G5 ) and with a very High End Monitor and a supe.rb graphic card (Nvidia Quadro FX 1800 to FX4800 ).
At last the Monitor and Hardware Profile Calibrator ( X-Rite by Greg Macbeth ).
All this is a whole package for a superb digital age Photography processing .
And that include in yourself must be good in composing (creativity ) a photos and understand Color Patone and Color Temperature with a good skill in White balance control too.
So my dear friend remember that every Manufacturer for DSLR and lenses is very good & its depends on yourself on what kind of photograhy are you into .
Its just my opinion and knowledge that I will like to share with .
You have a good days and happily enjoy more shots with your New DSLR and lenses.
Cheers