Formula rotors?

meth_tical

I've recently acquired a set of formula Oro K28s. I did not get any rotors with them so my question is what rotors will work. I've seen the official rotors through merlin or silverfish but they are quite expensive (for me).
I ride mostly XC but do a a few long downhill stretches that require a bit of serious braking. I'm 15 stone but I don't think I'll need any bigger than 180(185) rotors up front.
Appreciate any and all suggestions.

Chunkers1980

Any.

meth_tical

Thanks, that's good to know. I assumed they came in varying thickness' and some will work better with a certain brand than others

felix.london

I've used most of these and they're all fine;

http://superstar.tibolts.co.uk/index.php?cPath=50

...not the floating ones

meth_tical

thank you felix