I am very sorry to here of your health problems and I can fully relate to what you are going through. First, I lost my job and had to pretty much sell all of my best and beloved gear. Losing my job and my gear bit by bit really did a number on my spirits to where I don't even feel like I am the same person anymore. Photography is a huge passion of mine and it is what gets me through each day! Even though many gave me flack and don't understand why I bought cheaper replacements for some of the lenses I sold rather than just keeping all of the very needed $, I know I did it for a very important reason.

Now, a couple months ago I came down with an excrutiatingly painful health problem that will only continue to get worse. It limits what I can carry for gear and limits the amount of time I can spend doing what I love but I still endure the pain to keep me and my passion going. So needless to say, I've been dealing with blow after blow and I know what you are going through.

My opinion is to buy whatever you think is going to work for you to keep you shooting whether it is new and ligher, used, Canon or non-Canon but just KEEP SHOOTING! It's what is helping me more than any pain pill my doctor has prescribed so far!

Good luck with whatever you decide on and I wish you the best!

Denise