I am new to namepros but not new to the domain business. I have close to 800 names parked at Domain Sponsor and I really like them because they allow me to self (force optimize) my domains. If you have a few domains with them and call them, they will be happy to allow you to have self opt.
I have noticed that once a domain gets optimized, the load time gets faster. I have a few domains parked with them (and cheated a bit) and used framesets for
www.partypokersite.com www.pokerstars.cc and
www.freepokerdollars.com . The flash banners load first, and then the DS page loads.
I also have about 15 names parked at domainhop. I use domainhop for domains that cant get the PPC on sedo or domainsponsor. I had yahdoo.com and could not get very much ppc on anything until I moved it to domainhop, Now I am getting the popup revenue and the search bar at the top helps.
Sometimes you have to experiment and try differnt parking programs for differnt domains