I applied for Sedopro this week. I was not only turned down but...
Namedrive by contrast are helpful communicative and are doing everything that is reasonable to try to make their service more interesting and rewarding to the IDNer. That is a company that is going far.
There are people making 40K$ per month from parking who were turned down by Sedopro.
Sedo is by far the most bureaucratic company in this industry. I understand they hired Kafka to design their business processes.
I very much agree that Namedrive is a company that is going far, and I'd recommend Namedrive to anyone. I also use Domainsponsor and Skenzo as well as some homegrown adsense minisites. I've heard good things about parked, but I haven't tried them yet.
The choice ultimately depends on your niche(s) as well, but I think
Namedrive is an excellent choice to start with.
levanle - if I'm not completely mistaken you own some .vn domains: Sedo seems to filter some vietnamese traffic, while at Namedrive you get paid for every click.