question about spell perfection.

[Thormind]

The way the feat "spell perfection" is written is a little confusing. Lets say the spell i chose is fireball. Can i use Enlarge Spell, Empower spell and Widen spell all at once without raising the spell lvl or the cast time? (spell lvl 3, enlarge +1lvl, empower +2lvl, widen +3, total 9lvl).

Or am i allowed only one "free" metamagic so long as it does not bring my favorite spell over the 9th lvl (to prevent using metamagic on 9th lvl spell)

[Majuba]

Just one free metamagic - you can add the rest as you are able, with the same total effective spell level restriction.

[DesolateHarmony]

Fireball with Enlarge Spell, Empower Spell, and Widen Spell with Spell Perfection would be legal, since it does not go over the level-9 limit, and would be cast with the minimum of a 6th-level spell slot (barring other sources like magical lineage).