I would advice against importing computer parts to Sweden from outside the EU.
If your package is picked up by customes you will have to pay import tax, VAT and a customes fee on all your parts. So it will quickly become more expensive than just buying your stuff in the EU.
And no, Amazon Prime is a thing that only applies to the native Amazon countiries. You can get free international shipping on some ware on the US Amazon site, but those are not that common.
Galaxy S7, it just looks better built and refined. The G5's modular parts seem like a gimmick to me(great idea, poor execution. having to power off the device each time is BS). I watched Erica Griffins video on the G5, and while her unit might be an isolated case(small dents, horrible screen backlight, poor fit and finish), there was still nothing that the G5 has that the S7 doesn't(other than the removable battery, which isn't a big deal any more).