Kevin Ohashi has put together a very thorough comparison of performance benchmarks for a number of managed WordPress hosts on Review Signal.
Included in his review:
- A Small Orange
- WP Engine
- Godaddy (managed)
- Digital Ocean (VPS)
A few hosts weren't included that I'd love to see added at some point:
- Media Temple (managed)
- Bluehost (managed)
The comparison of those included is extremely in-depth with a fair analysis of each company.
All in all, my takeaway was that most of the hosts performed pretty well on a performance basis. When you compare that, and then the pricing, it may be tempting to choose only based on price. But I'd warn against that.
The biggest thing that stands out to me after looking at this review is that support reigns supreme as the primary metric worth looking at. So, check out the post, use their input on the various quirks or notable items for each host, narrow down, and then choose the option that best fits you and has outstanding support.