I've done a bit of work on the 'high awning' question. Our 2011 3812 has a 20 ft awning that runs over & above the front door & kitchen slide. It is a Carefree power awning and runs out horizontally; very high. It's short on shade and awkward to add/remove lights or auxiliary screening. I found out that Carefree has a 'steep pitch' version (won't work, would foul with the slide) and an 'adjustable pitch' version. The adjustable pitch one has the lower legs (the ones with the rollers at the bottom) built such that they can be set shorter with a pin & a series of holes. This in turn should allow setting the pitch lower. It looks like I could get about 15 degrees before the slide gets in the way. They won't sell parts directly, but I got pricing on the 'adjustable pitch' legs which only come with the electric motor. It's pretty steep at well over $800, and I have no idea if it will work well. Maybe the 1st adjustment will already be too steep, and maybe the small amount of pitch won't add enough shade. It will certainly make it easier to add screening & lights.
I've thought about trimming my legs a bit to make a one-time pitch change, but am not sure I trust my geometry skills enough.
This info may not help you. One thought would be to ask for a manual awning if it's not too late. We added a manual awning to the side of the garage and it works very well. You can set the pitch of those wherever you want.