I was a heel striker who wanted to move to a midfoot to try to be more efficient
I started off with skechers gorun ride which I really love. They are very light, but feel cushioned 4mm drop and have technology in them to encourage you to land midfoot. My size 7 weighs 220g which is a little bit lighter than my saucony fast twitches.
Don't be put off by the brand, they are a great shoe and come in lots of pretty colours. The gorun ride and gorun ride ultra are pretty much the same, I have had both, just depends what colour you like! I have done 600 miles in my first pair and did 100km ultra the other week in a newer pair.
If you want something lighter there is the gorun2 which is 170g, that is more of a minimal shoe in that you can feel the stones underfoot but it is still more cushioned than the NB minimus and it is also a 4mm drop
Wiggle have some of the models going cheap at the moment.