Go for the 60 page one only if you feel you're going to run out of pages otherwise don't bother. I use the 60 page ones and never had any issues with any consulate so far.

I usually carry all my passports with me when I'm traveling but keep the old ones separately (not stapled or with rubberbands etc. as many do). That way I can show travel history if ever required and have some kind of backup documents (for whatever it's worth) if I lose my current passport.