I have been watching this thread for awhile and felt I needed to finally become part of the community. It seems like you have a good plan(s) in place. I had a misfire in cylinder 2 on my 05 LGT sedan but after cleaning the MAF, switching around ignition coils, and switching around injectors the misfire has cleared up and my idle is much better. Man those injectors can be a pain to get back in. Also did a compression check and got 145-140 on all cylinders - so worn but equal.
I am fairly certain I have a spun bearing as my car knocks above 2700 rpm so will most likely be doing an engine rebuild in the near future. Don't think it is the TB tensioner or valves but I hope so.
If you haven't checked out Jafromobile, Ratchets and Wrenches, and CareyHolzman on Youtube, they seem like excellent engine rebuild resources. I say seem because I have never rebuilt an engine before. Jafro is DSM vehicles but goes through engine measuring/rebuilding better than anyone else I have come across. CH and R&W are good for breaking down the engine and putting it back together.
I would like to compare engine rebuild lists when you get a chance. Good luck!