hey everyone,

I need to make an Ethereum payment Monday so I'm looking for a good wallet.
I've made several attempts in the last months to start an Ethereum wallet and finally I gave up (took daaays each time and failed in the end).

I would like to hear some advice on which wallet to choose.  I'd need to make a payment by Monday, so if it needs to sync 2 days again I want to start today...

-is the official Ethereum wallet the way to go?  I tried with the GUI version, but had no success (even on a pc with ssd)
-exodus, jaxx?
-online wallets?  I need the wallet to make a payment for an ICO (Bancor) but the payment cannot come from an exchange.  So I assume it cannot come from (eg) Poloniex, but is Coinbase or CEX.io allowed?