Thanks for the replies. Since I'm a bit low on spirit (regen), and expect more healing power soon (two ZG enchants for the T2 helm and legs, two AQ20 healing books, healer weapon/off-hand combo), I'll choose the +20 Spirit enchant for the staff:)
"Man only plays when in the full meaning of the word he is a man, and he is only completely a man when he plays." -- Friedrich von Schiller