yeah i am wavering between thoes. I need 8FPS becouse i like the high rate to take some nice shots. And sappper6fd.. that was alot of bullcrap. Olympus and pentax make damn good camera bodies. Most people say K-5 and E-3 is some of the best constructed bodies. And how can Nikon outpreform pentax and sony when they all use the same sensor? And yes pro`s use canon and nikon becouse they where the big boys realy. And many of the pro`s cnat risk the change of brand and maby not get the same results as they got with the other system they used. So i ask for help not fake facts. So let people who have experience and have real facts answer please.
back to the topic. If i am staying out a whole day in the winter with a 7D and a lens. What can i buy/get to make the condition for the camera better?
Let me elaborate for you on your points since I have been shooting sports and wildlife (bears, cougar, wolves, elk, dear, eagles and hawks) for the last 35+ years.
Burst mode. You rarely need burst mode. It sounds cool, but in truth, one of the keys to a great sports shot is capturing the moment. Burst mode or Spray and Pray is a hit and miss at capturing the moment. Kind of like shooting a firearm. The good shots hit the target consistently one shot at a time. Spray and prey is just a hope. Good sports shots come from Knowing the game, the rules and the participants, their strengths, their weaknesses and their tendencies. When I am on the sideline shooting football at say OU, OSU, Texas etc. I have studied the starting lineup of both teams, offense and defense and can anticipate the action.
Bodies. Pentax and Sony make decent bodies as are the Nikon and Canon. In your price range none of them are all that for rugged.
Sensors. They do not in any way shape or form use the same sensors. Canon produces their own. Nikon sensors are made by Sony to Nikon's exclusive design. Each has their own sensor design and performance. Canon and Nikon Sensor generally out perform the others.
The big boys don't use Canon or Nikon cause we are "Big Boys" Sports is not a one lens game nor is wildlife. Here is my basic gear list for sports:
Canon Bodies:
1D MkIV
1D MkIII
40D
Zoom Lenses
Tokina 11-16 f2.8
Canon
16-35 f2.8
24-70 f2.8
70-200 f2.8
Prime lenses
Canon
24mm f1.4
35mm f1.4
50mm f1.4
85mm f1.8
100mm f2.8
135mm f2
200mm f2
200mm f2.8
300mm f2.8
400mm f2.8
Notice that there is nothing slower that f2.8 in the group. Two reasons. 1st, anything slower that f2.8 is fine in the sunshine but too slow under the lights indoors or out. Secondly one of the differences between a sports snapshot and a striking sports photo is good use of DOF. For most sports you want just enough DOF to capture the action in focus but have all the players etc in front of and or behind the action out of focus. That makes the action POP.
As for facts, well you might want to do some research. Sony & Pentax don't make the cut for sports for several reason. Their high ISO performance lacks compared to Nikon and Canon and that counts when you are shooting indoors or outdoors under the lights. Neither makes the range of lenses needed either. One quick example you can't find a 400mm f2.8 prime being made by either company presently.
If you are budget shooter for sports and wildlife and want to concentrate on sports I am going to suggest you look at a 70-200mm f2.8. It will give you the speed you need, although it will lack a bit of reach. I am going to suggest Canon or Nikon for the reasons listed above.
Keep in mind that a lot of the same reasoning goes for wildlife photography as well. The golden hours are some of the best times to shoot a lot of wildlife, not the middle of the day under the noon day sun. You need faster glass and good ISO performance unless you are actually looking to mostly shoot birds.