Help required with first build, feeling a bit lost...

Hi guys, been lurking on here for a short while but now is the time to say hello and ask a few questions!

I'm struggling to find a decent kit to convert my current bike, there's so many people doing them I can't narrow down who to use. The bike is a hybrid with 27.5" wheels.
I do a 10 mile commute 5 days a week with 2 hills each way. I'd like to be able to do 20-25mph assisted is fine not too fussed about a throttle.

I would prefer a hub drive purely for aesthetics over a mid drive but as I understand it mid drive are cheaper so I'm not totally against them.

I'd like to purchase everything from m one place in a kit ideally as I don't understand the mixing and matching of batteries and motors from different companies unless you guys can help me there?

This kit seems good albeit a expensive and a big overkill for my needs?

https://electroncycles.co.uk/product/available-in-7-days-bafang-bbshd-1500-watts-52v-15a-30q-battery-40a-output/

I've donr some reading on here and see the EMV3V comes highly recommended, but all of their kits don't seem to come with a matched battery and I don't know which one to pick? Such as this

https://em3ev.com/shop/bafang-48v-1000w-bbshd-kit/

I'm in the U.K so customs charges would have to taken into consideration as well.

Thank you.

The first kit you posted is what i would have bought. A bit pricey, yes, but absolutely ok.
1700W will bring you to 25mph and it will master hills easily. The 30Q cells are very good as well.
EM3EV is a great dealer as well, ordered several times from them. The do make batteries on demand, and they do sell ones that are a perfect fit to any motor/controller you may choose. They deliver fast and there has never been a problem. And if, they will solve it. But they are in China.
So a local dealer is a plus for sure. Can't say anything about the shop you linked as i don't know them.