I suggest Bendigo Woollen Mills for their high quality wool and cotton. They also have blends as well. They usually have 200g skeins for about $16 which works out to be very reasonably priced.
You could also try craftee cottage. They have some of the best known brands like Patons, Cleckheaton, etc. They’re a little more expensive as they’re a smaller store.
Regarding Spotlight, I made a chunky hexagon cardigan with Hue & Me which is a wool blend and I love it. When Spotlight have their sales I think I paid $20 for 3 skeins.
I think an 8 or 10ply wool or wool blend for winter is great, however there are some good acrylics out there also. I’d go with a 5 or 8ply cotton blend or bamboo for the summer.