I'm considering purchasing an FJ60 with ~150K miles, rebuilt engine, looks clean on the inside, but has the classic sagging end issue. I'm meant to meet up with the guy in the next couple days, but wanted to get some opinions regarding options for the rear suspension. I talked to a certified TLC mechanic in my area, and he recommended the OME suspension (of course), but as everyone complains about, it's going to run me about 2800. I've read some regarding the add-a-leafs, and was wondering if this would be a fair band-aid for the short term (a year or so). I wouldn't mind putting the money in for the OME, but would like to drive it for a while and make sure it doesn't need anything else major before I drop 3K (seems like the add-a-leafs may be only a few hundred w/ labor). Could I also put on new springs with an add-a-leaf, or would that not be wise if I plan to upgrade the suspension at some point? Obviously my car knowledge is limited! Just trying to understand my options. I plan on having it looked at by a mechanic before I make my final decision, so some of my questions may be answered after that, but I'd love any input/opinions y'all may have. Thanks!! 
