Hosting Question

My current host doesn’t seem to be able to handle a movable type blog that has a large number of entries, comments and traffic. As a result, comments are slowing down to a near crawl, posting entries is quickly becoming tedious and archival rebuilds are damn near impossible. Can anybody recommend a good host which is Movable Type friendly? I go through about 150 GB of bandwidth a month and growing and I’m looking for quality over cheap hosting.