Whatever you buy just make sure it's long enough, some chains are only 114 links long and if you have a Yamaha motor and run a large chainring it will be to short.
Like soundwave said, buy a shock pump if you have air forks, even if the shop sets them up for you, you will still have to do them yourself at a later date
Hello N961 and welcome to the gang
I have a lapierre and love it.
I'd ride all the bike that you can that are within your budget and then make the choice on the one that fits you best.