I don't think I would follow 205 with 80... PERSONALLY. I don't see much benefit in that, again, personally. If the paint is soft, try orange/205 first. IF the paint is soft enough and IF the paint is not marred too deeply, you MAY be able to use orange/205 as your FIRST step. If that DOES knock out as much marring as you wish to remove, follow it with 205 on white/green/black (whatever cleans everything up well and ups the clarity). Now, this may not be enough, if the Orange/205 is not aggressive enough (marring too deep, paint too hard, etc), then move up to 105, but if by any chance orange/205 IS enough, ohhhhhhh man will it make your life a lot simpler!
To go into more detail about what I was saying in terms of "learning" to use 105... it just flashes fast and easy! If it's really hot out, even more so. Biggest thing, work in SMALL areas! And 105 can gum up your pads a lot also, try to clean them or swap them often.
As far as 95 vs 105 - I have not used 95, but I plan to start playing around with it. 95 is not really older technology... 105/95/205 all use the same non-diminishing technology and all were released about the same time, but for one reason or another, 95 did not get any hype and a lot of people (me included) have never tried it even! I've talked to a lot of people who DO like 95 a lot though, so I plan to try it out. If I get a chance, I'll try to get some varied experience with it and make a write-up of my opinion here on Autopia.
EDIT: Also, as far as 105, 205, two steps, done. Yes and no. Yeah, you could do almost any job with JUST 105 then 205, but if the marring is really terrible that may mean 105+wool, 105+orange, 205+orange, 205+white or some other progression. You have to start aggressive enough to knock out what you are aiming to remove. Every following step needs to be just aggressive enough to clean up the previous, rougher step, while also finishing down finer than the previous step. See what I mean? And then there are people who, shooting for 100% perfection (mostly show cars, non-DD's) will not even stop at 205. You may occasionally see as much as 105+wool, 105+orange, 205+white, Menz PO85RD or Ultrafina + black/blue/red. Getting overwhelmed? Don't worry, based on your first post I can tell you and I are the same type - I too PLUNGE into every new hobby and eventually, you will have more experience than you know what to do with I am sure! :werd: