Hola!
Well I have been agonizing over this. It’s definitely easier to make decisions about your own room vs recommending what your friends do.
So basically I am thinking about it like it’s my room. At the end of the day, I am still going to vote for .4 at 45°. Part of the reason for that is imo, 7.5’ to the center of the speakers is pretty low. I know 35° is inside of Dolby’s recommendation, but I’m afraid that it’s just too low. You may get 35° above the ear, but I just think the separation between the bed and height layer isn’t enough. 9 or 10’ ceilings would make me look at it differently. From what I recall, the guys that have had the most benefit from .6 have multiple rows, and/or very long rooms. Again, with a single LP I don’t think that matters as much. If you look at the pic I posted earlier it shows an “X” over the listener. Imo that gives the best left to right and front to back overhead imaging for the listener as well as maintaining good object placement. If you could get them higher, I would weigh things differently but I will stick to my recommendation.
Keep in mind I am basing this mostly on my own 7.x.4 with TF and TR. I have experience with other systems, but obviously I’ve spent the most time here. I can tell you I have no internet in .6 in this room. Now, if I was starting from scratch with a brand new room I would strongly consider.6, but would depend on how the content is handled. I’ve seen a lot of complaints about TM not being used, or conversely TM only being used on some tracks. Too much Fukkin around lol.
I’ve seen you on AVS. Have you asked any questions there? I only ask because I want you to have the most information you can get.
Whatchathinkaboutdat?