I see that it is available on BitStamp -- do they have high fees to transfer BTC or ETH over to them? (Does this take a long time?)
I also see that it is available on Cracken. Is this easier to use for a U.S. customer?
Are any of the other exchanges as easy and safe and speedy as these two?
What's the best/easiest way?
To avoid the higher transfer fee, you might want to look at purchasing Litecoin first then sending and converting it to BTC (or ETH if supported for trading) on the exchange. The fee should be a lot less than sending Bitcoin directly to an exchange.