900- 1200kv 150g outrunner, 80A esc, 2x 4s 3300 30c batts, 10x5 prop in 900kv, 9x5 if 1200kv
add some LED's for night flying and you will have a blast. 6s can be fun but mate it is extremely loud and it's not really made for more than about 1000w and 100mph. 4s is great for people not used to hand launching big wings as it will basically fly out of your hand.
but heck if you have a spare one why not go all out
i ran my original ZII up to about 2000w on 6s and it was a heap of fun. Poor build meant it failed mid flight and went for a swim.
let me know if you need more specific help with hardware selection.