You could always get a divorce (just kidding)
I too read the Salvatore novels and they do have some comic book trades of the adapts of some of his novels.
Check out http://devilsdue.net/
As far as other books and you not wanting to be bogged down in story: tough luck
Marvel and DC love to cross over books here and there because it gets folks reading other books (the very trap you are trying to avoid)
My suggestion would be discipline. Find a few monthly books you like every month and just stick to them. If you want to pick something else up, find something in your stack to drop.
My wife has me on a $20 per week limit (it was almost $60 a week before I was put on a budget) and i have to make sacrifices that i dont want to make.
Know what you want ahead of time. Look at the publishers websites and you can see whats coming out months in advance. Plan out your comic buying and know what you want before you go shopping.
Get a hold box at your local comic shop. Sometimes I have books in my hold box for months. Until I have a small week and can buy the book within my $20 allowance.
Read the book for free. Read the book at the comic shop. It sound crappy but sometimes you have to do what you have to do. My comic shop guy doesnt really care because he knows I'm going to buy books there regardless.
Hope this helps. And the best way to get your old lady to not gripe about your comic habit is to get her hooked.
Fables and X-Factor by Peter David keeps my wife reading at least a few books a month. And she loved Terry Moore's Echo #1 last week.