Replying to Look P-10's I need some info

So if I get look P10s for my brother for his birthday would they be ok to set the din at 8.  He is 150 pounds and 5'9.  I can get some for super cheap right now..........
Also would soem work for me too, I'm 145 lbs. 5 '10.  I can pick up some for hella cheap right now so I wanna get a few pairs.  Or should I just wait for some P12's.  I use p12s right now but if the P10's would work with a din at 8 I'll just get a pair for backup or soemthing.  and can you fit them with widebreaks?