Well, it looks like that place only sells rebuilt monitors, which will likely be an old tube, with a new "8-liner" replacement chassis. So the original manufacturer is really a moot point.
Not that it really matters what brand you pick, not for home use, it isn't going to be on 16 hours a day, 364 days a year like it is in the arcade.
Older Hanterex monitors seem to have a bad reputation.
While the Wells Gardner D9200 is actually supposed to rival color vector monitors in unreliablity. I know a TON of people here have bought them, and a ton have had problems. I have also talked to some techs, and read some RGVAC posts, and the general consensus is that they are junk, really fancy JUNK. My only first hand experience with this was seeing them bring a brand new Police Trainer 2 into the pizza buffet I frequent, it had a D9200, and the monitor went out the next day. It is still sitting there dead right now, months later.
Other Wells Gardner monitors are generally fine. If you end up buying a used monitor, then go for an Electrohome G-07 if at all possible, as that is one of the most reliable ever made.