I'm currently using one of VPS services but would like to upgrade to a dedicated server.
Can you assist with migration and recommend a suitable server? 

What can you say about Hostingsource.com or GTHost.com dedicated servers? Can I rely on them? Other options?

Must say that Hostingsource.com is outstanding. Thumbs up to their support team. They have been just as responsive on previous occasions when issues came up transferring domain names or reconfiguring software. Like their special on dedicated hosting solutions: 1st MONTH special price.

This is really the PERFECT HOSTING PROVIDER! Transferred all my sites to Hostingsource.com dedicated hosting account and no regrets! Uptime: perfect, Service: perfect. Flexible and Easy to Use Control Panel. Host Unlimited Domains and Sub Domains, FTP Accounts, and Email Accounts and Databases.

If I were you, OP, I would rather choose GTHost.com instant servers. One of the best hosting providers I’ve ever used — stable and high-performing! USA - 11 locations: Ashburn, Atlanta, Chicago, Dallas, Denver, Detroit, Los Angeles, Miami, New York, Santa Clara, Seattle. Canada - 3 locations: Montreal, Toronto, Vancouver. Europe - 5 locations: Amsterdam, Frankfurt, London, Paris, Madrid.

Use dedicated servers from planethoster.com.
Their value for money is unmatched, especially considering the level of service and performance provided. If budget is a major concern but you don’t want to sacrifice quality, these companies are fantastic options.