There's 2 things I want/need in an on-camera monitor: peaking and false color. (Assuming that with these features, HDMI is included)
What's the most affordable monitor that can offer these features?

Check out the new Marshall 5". I think it's the LCD50, around $500. Only think i don't like about it is it only runs on AA's.

There's always an adapterplate, right? Even if it's aftermarket? Thanks for pointing this monitor out.

it's one nice monitor, but if u r shooting on DSLR, re-scaling option is better on new Zacuto EVF or SmallHD DP6