I like Dressage Today :3 but then again, im bias because I do Dressage, LOL
They don't have JUST huge upper level Dressage-y stuff in it. They have a lot of lower level stuff too, like articles on the importance of flexing your horse, counter canter, circles 101, posting effectively, etc.
I had no idea about the Practical Horseman, I always figured that was a Western Rider magazine, LOL.
Horse illustrated is good for a lot of the basic stuff too, so im glad you have it =) Horse and Rider is also good with basics, but they feature western as well ^_^
I would get Young Rider if you are youngish and new to riding. I've been riding 9 years and I'm 15 and I find Horse Illustrated mostly geared to riders who own their own horses, where as Young Rider is geared toward newer riders.
Equuestriaan I wish I was a youngish rider. My daughter use to get Young Rider she really enjoyed it. Heck I even read some of the articles. :) I have been riding Western for longer then I want to share :) but I feel like a newborn baby when it comes to English. :) I was taking lessons and loved every minute of it but with my Trainer moving to a new place that only has an outdoor at this time we are at the mercy of the weather. So I have been reading everything about English I can get my hands on while wanting for better weater to hurry up and get here.