Will they fit? I have just got my hands on a modified Yamaha FZX 750, and the brakes are already good, but... The blue spot callipers are just awesome, and they look brilliant as well. ;-)

yes they will - not exactly sure but you might need to file a bit of ally away on the fork (i did on my FZR). Do not run bluespots with original master cylinder, you will have horribly wooden brakes - get a master cylinder from a bike that runs 'spot' calipers: R1, R6, FZ1 etc.

Cool. I'll see if I can find a set! :-)

Here's a pic of the bike in question...

that's a looker

I see you already have 4 pots on there so apart from aesthetics, no real benefit IMHO