Wife upgrading to iPhone 8, wired or wireless charging recommendations?

Hello all
As the subject says, my wife is soon receiving an iPhone 8 and would like to use a wireless charger probably instead of wired. We have never used one before so I was wondering what experiences anyone has? First, I read the phone has to be lined up properly on a charging pad in order to get it charging at all or get the fastest speed. Any easy ways to do that or recommendations on pads with even a little bit of markings on them to help? Second, she has a wall outlet with both 1.0A and 2.4A USB ports, will the 2.4 port work with a 7.5 wat charger for fastest speed? The chargers I've researched are way cheaper with out an AC adapter being included with it or the purchase of a fast charge adapter separately. We are looking to buy as cheap as possible, as she would like a pad for her bedroom nightstand as well as either a pad or stand for a living room table.
Finally, we picked up a case that said in it's description it can be used with wireless chargers so that is probably fine. I also saw that Mophie has a wireless charging pad along with either their iPhone 7 or 8 battery cases. The pad has magnets for the case to line up with to charge. I am assuming you can buy either the 7 or 8 battery case? Those are a little expensive but I would consider it if it would be easy to use. I myself so far am sticking with a 5 S for another year but can still get the 8 at a good price for 2 more weeks if I choose.
Thanks for reading my ramblings and any recommendations, suggestions or opinions would be great!