I have: McAllisters which are nice for the price. Rhinos which are REALLY expensive but are REALLY well-made and last a REALLY long time. Weatherbeetas are nice, but my guy manages to rip them within a week of getting them. Rider's International are pretty great, many different styles and weights to choose from. Some people swear by Rambos - I won't drop that much money for a blanket... yet.
My weanling's blankets are from eBay
. They're new, from Tack-R-Us. Great blankets, lots of cute patterns/colors and most importantly - CHEAP! She's going to grow out of them soo fast she wasn't getting expensive blankets. I only spent 30 on the sheet and 40 on the blanket. They are great for the price.
Depends on how hard your horse is on blankets and how well they fit him - some aren't too great for horses with big shoulders.