I like Alpinestars, but their brand is on the pricey side. However, they make really high quality stuff. I used to go through a new jacket every year (I ride every day), but I bought a new Alpinestars 3 years ago and am still wearing the same jacket to this day! That is worth the money to me.
newenough and bikebandit.com are both good places to buy. Been around for years and I have had good service from both.
For Alpinestars I would buy one size bigger than you would normally wear as they are "European cut" and as a bigger guy I always have to buy a size bigger than their sizing charts say.
Enjoy your new jacket!
