I am partial to WordPress. However, if you check my Lots of Links page, under the Software section you will find links to software evaluations. Some of them attempt to be even-handed and objective, others are just people sharing their experiences.
The software where “They Host” will be easier to get started with, no matter which you choose, but will usually have more limited options. For example, you might not have as many themes to choose from, or be limited in what you can put in the sidebar. Many people do not find this to be a problem at all, or, by the time they do, they are ready to do it themselves with their own hosting.