These are more pannier bags than saddle bags. The true "saddle" bag is the type with straps that loop through the saddle or saddle frame.
I think you could divide saddle bags into "upscale" and "downscale". For downscale bags, I like the Banjo Brothers offerings, particularly their small, barrel bag. For upscale, I like Carradice and Brooks. My favorite of all is the Carradice Zipped Roll, which is perfect in size for a day trip.
Banjo Brothers Barrel: for not much money you get a small bag that carries what you normally might carry in your pants pockets. It's for short rides lasting a couple hours or an afternoon.
You can loop through a traditional ballooner seat frame with this one. This is a 1950 Columbia 3 Star.
The barrel also works on the Brooks style loops. This is a 1946 Hercules Model C with the barrel.
Carradice Zipped Roll: This bag is a lot more than the Banjo Brothers, but you also get a lot more in terms of size and quality. They both have their place. This Carradice is attached to a 1958 Raleigh.
Brooks recently revived a number of old bag designs, some of them really nice. They are expensive, but very nice.