More than focusing on brand, I'd try to find what size, grind and condition I'm in the market for.
There are stellar shavers in all categories.

Avoid the cheap pakistanis and most cheap new production models and you should be golden.

Browsing around these forums, the razor clubs in particular, will give you a good feeling of what is popular and considered "up there"

In threads like "shave of the day" you'll find a lot of high end stuff as well.
Most people show off some really sweet stuff in there.

All that said, there is not really all that much difference in shaving ability on a ton of respected brands from the past out there.
Some are more popular (pricey) than others, but a well maintained vintage razor will work wonderfully.
Much more often than not.