I have all those keyboards you've listed in OP and if I have to choose just one then it's Filco yellow. It's a lot nicer IRL plus not too many people have one with yellow Filco logo and LEDs. =P
Show Image
(http://i4.photobucket.com/albums/y146/eddie84/OCN/Mech%20keyboard%20club/Filcos/th_DSC06759.jpg) (http://i4.photobucket.com/albums/y146/eddie84/OCN/Mech%20keyboard%20club/Filcos/DSC06759.jpg)
Get it now before it goes up to $230 like that Limited Edition reds. lol
1. Buy yellow keycaps from KBC/WASD
2. Buy yellow LED from the store nearby your house
3. Buy gold paint/gold FILCO label from Taobao
4. Mod them onto your original FILCO.
5. PROFIT?