Sounds like you've been down this road a few times. DOES asked a question and I responded with the unit I recently installed. My previous units were a weak 70 lbs and couldn't keep it up. Some here mentioned the stiff 135 units were overkill. Some mentioned 90 to 100 lbs would be perfect. So I bought the SACKS 115 lbs units. They lift and close easy and I'm not seeing any lid bow due to compressed pressure. They are an exact fit to my original body hardware and cost $25 each delivered.
I also machined some SST end bushing that center position the units.
I'm a newbie and made the best decision based on this board of which you contribute some pretty good advice. I'm guessing I'll be addressing this again in a few hundred cycles.
I'll try to add a few pictures for fun.
Regards to all.