How worn is too worn?
 

Chaps,
Beginning to suspect my brakes need replacing, front discs have a 1/2mm lip on the edge(don't know the actual width as I haven't got measuring callipers) and the front and rear pads are down to about 5mm and the wear indicators are squeeking.

Obviously this is going to be a big bill month, but are they ok for a few more miles or should I change them soonest?

Also, is this a good package for fast road:

Ferodo DS2500 front pads
Standard front discs

standard rear pads

And how much is it all going to cost me??? (supplied, I can fit them myself)

So many questions!!!!!

Cheers
Dave