Depends on your outlook for silver... if you think silver has an immediately bright future 10oz will give you a shot at silver appreciation and semi numi appreciation... well more then 5oz anyway. 1kg waste of time until 2019.
Personally 5oz is so perfect
Bullish engulfing candles on the daily, nearly weekly, and monthly for gold and silver... will be interesting to see where this week ends up but IMHO until proven otherwise we have a bottom of sorts!