Ok - did the swift transfer today :
Start with R120,000
Pay R750 fee (think that will be subtracted from my Cheque account separately)
FNB gives me $9104.5 (FNB rate 13.1803 vs google rate of 13.03) ~1.15% cut for them
I believe a further 10USD will be charged before i receive it in my kraken account.
kraken spot rate : $4614.24
Luno spot rate : R64 013
thus Kraken via swift should give me 1.97096 BTC for the 9094.5 USD after fee's
Luno will give 1.88633 BTC for 120750
break even is roughly R10,000 (possibly less as i think Swift transfer fee's varies between R250 and R750), but after that Kraken is kicking Luno but.
Will give a final summary once i buy BTC on kraken - swift transfer according to uncle google can take up to a week.
obviously if you can register with a popular exchange that sells BTC even cheaper than Kraken, even better.
*update*
Kraken confirmed the deposit roughly 30 hours after sending it.
Spot rate for buying it last night was $4877 - was a bit of a bubble and dropped to $4699 today.
so basically - if you believe bitcoin value will not jump 5% in the next 48 hours, and you have more than 10k to send - then swift transfer bypassing luno might be your cheapest bet,