Bummer on not being able to fit bags. You got the grinder out so you are halfway to fitting those tires. Some strut spacers may be the other half (How happy you want to get with the grinder/hammer
). I like tall skinny tires both for off-roading and mpg. Should have enough torque to be plenty driveable.The notable increase in comfort is due to the taller sidewall (xxx/70Rxx). I'm planning to get /80 on mine with strut spacers and R bags for the exact same reasons you are. 165/80/15 vs 205/55/16 looks to be about 2lb weight reduction per corner (assuming new Al 4.5" rims).