Sounds like I'm in the same boat. I took the 100 camping this weekend, and when I loaded the fridge and some gear in the back, I could bottom the rear coils just by pushing down on the hitch. Lame. I knew it was soft back there, but didn't know just how bad. Like you, I don't plan on adding bumpers and winch, etc....I need just a tick of height w/o getting the wife mad at me. On the 80, I put OME and they rode like garbage unloaded, which really made her mad. Thing is, I don't know that there is any other option out there for just a little higher than stock with virtually no load change. Add to that, the factory replacement coils actually cost more than the 1.5 OME.
1978 13BT-40, 70 series mechanicals
1966 FJ45 lwb stock
2003 100 stock
1974V8J40, 1992FJ80, 1985FJ60, 1971FJ55, 1978FJ40, 1974FJ40, 1997 LX450 all long gone.