Seeking hosting solution

OK. This has gotten out of hand. I’m hoping some of you dear readers can point me in the right direction. I’m on Yahoo’s Small Business plan for hosting this blog and it’s less than optimal. It’s slow, and I often can’t get into the blog because of 500 Internal Server Error messages, preventing me from combating comment spam or rebuilding individual archives.
So if anyone can recommend a good host provider, who can make the transfer of files to their servers easy, I’d be most grateful. The provider should understand and support Moveable Type blogs installations and it would be ideal if it supports dynamic publishing. (You bloggy types know what I’m talking about.)
Please drop me a line or leave a comment if you have any ideas on hosting.
The Management