2. LCDs are fragile
3. Cleanroom or bust
I'd go with 2.
Jitter - Look at other people builds and use a known good combination, shielding and changing refresh rates helps a lot as well.
The cleanroom thing you can get round by being very careful not to separate the panel layers, you could bag them while working as well.
Paint is difficult, that's true, but you could always not paint your case.
But fragile LCDs? - That bites a LOT of people.