Canon 650-4ti owners, what computer system requirements are needed?

With my current camera a Panasonic FZ30 I shoot raw in some cases.  I'm a nature photographer who shoots mostly wildlife, flowers and landscapes.

I think the answer to this question will depend on what I see from the 4ti results.  I may be dreaming but I would hope the need for lots of post processing will be reduced once familiarity and use of optimum settings will reduce this need.  Some exceptions to the rule, of course.  My motto is the less the better.

With my current camera I'm limited to how and where I use it.  I have to keep the ISO on 80, the camera minimum because noise and detail smearing makes anything higher un useable.  With use of a higher ISO range I suspect the number of shots I currently take will go up.   With wildlife as a subject, you never know.  Opportunity is everything.  If anyone is interested I have some samples of what I shot posted in my gallery.  Many shots in low light I either pass by, or delete due to my camera's limitations.  My brother has a Canon 40d and he continues to shoot long after I can when we see wildlife late in the day.  We have a tremendous community rose garden where I live and the calmest part of many days is after sundown.  Even using a tripod and flash, one can only do so much.  I don't see myself using the camera in a machine gun staccato fever often like I observe others doing around wildlife.   One pair of photographers I was next to I overheard make the comment she takes 3000 to 4000 shots an outing in hopes of getting 1 or 2 that are good.   I'm a lot more selective than that.  If the critters are moving about, that can explain the need for taking more shots.  But how many do you need of a stationary subject with the same settings?

This part is encouraging to think I wouldn't have to come up with as much money for a new computer system as what I plan to spend on a camera kit just to use the new camera.

Your answers help to relieve my concerns about what I can get by with until the cash flow will allow upgrades.

Thanks again, Mike