I did the demo and I loved it but, I have 2 questions. I can use a paypal with USD on it to pay for HB correct? If I can then how much would I be charged? (I did a google search and it said ~31 USD)
It depends on the current conversion rate which changes every day. You could wait until you get a good dollar - euro rate so it'd be cheaper but it won't be by that much. PayPal will automatically convert your dollars and charge you the amount based on todays rate.
Why not get both. after i bought hb i bought gb and i loved them so much i upgraded to lifetime in under a week