I have an off road half marathon coming up in june and have decided, perhaps a bit late to get a new trail shoe because my current ones I have had for a while now(since september) are getting on. My current shoes are Salomon SLAB XT Wings which are pretty nice and before that I had Salomon XR Crossmax.
I am contemplating getting Adidas Kanadias which I had before then as I know they are good and quite cheap so it doesn't matter if they dont last long.
So I'm thinking either Adidas Kanadia, Walsh, Mizuno Wave Harrier or one of the New Balance Trail shoes.
Marathons are running races, people should aim to set out and be running most of it. If you havent done the training, don't do it. It is kind of ridiculous to do a marathon without having done 5k, 10k and a half marathon previously aswell as these prove that you are able to run and will enjoy the experience more.
Quick lace system is very good, it is quick, provides a nice even fit to the shoe instead os the strangling you can get from laces.I have had the experience of them breaking though which was irritating eventhough I managed to get a replacement kit and I have never had laces break on me before but the shoes otherwise are very good
Not sure about the Boost, quite expensive and maybe not best to jump in with a revolutionary shoe if it is your first proper buy. I would advise any neutral cushioned shoe such as Asics Gel Kinsei/Nimbus and Mizuno Wave Rider but yes there are plenty around