I was going to say to buy ZI instead but if the issue is, at least sometimes, not keeping up with re-setting the film speed on meter and/or camera, then maybe ZI isn't best since you have to manually set the speed.
Konica RF and M7 on the other hand automatically read the film-speed. I have to admit to having had bad enough GAS to have acquired all 3 (Konica RF, ZI, and M7).
Konica RF not only has the automatic reading of ISO when you put in the film canister, but also has auto film advance and not-at-all-finnicky AE and AE-L settings. I don't like auto film advance and I don't like the volume of the sound it makes.
M7 has auto reading of ISO when you put in the canister, has quietest shutter, has manual film advance, has AE and AE-L settings (though AE-L is finnicky), is not completely battery dependent (albeit only at 1/60 and 1/125) and has Leica build.
ZI does not auto-read the ISO, has not-so-finnicky AE and AE-L, has louder shutter than M7, has buttery-smooth film advance, is totallyl battery dependent, is comparable (at least to me) to Konica in build quality, and has best viewfinder of the three.
I don't think M7 is necessarily THE answer. If you have M7 money, why not get the titanium "Limited Edition" Konica RF with the 50mm f1.2 lens.
Julian