So Ross...after reading your posts, my question is do you still need a VPS just for the "Message" plugin even after they have optimized it? 2nd Do you need a VPS for1.6 version?
Say 5,000 members with 50 users daily
Wilson
For your website to run fast considering the current amount of users and taking into account the potential users, I believe the VPS and dedicated server is the best option starting from 1.7. version of the software. For 1.6. as Kelvin says that depends on the amount of concurrent and active users, the extent of the content. The best of all would be a VPS or Dedicated server.
If you want to have a serious website/business you don't even think about the shared plan, just stating the obvious)).