You've considered the whole issue, and have decided to buy a telescope. Read the chapters on telescopes. Look at the ads and read what other amateur radio astronomers are saying about telescopes. Since astronomical objects are usually faint, big objectives have the advantage of collecting more light and forming a brighter image. Refracting telescopes, unless huge, are useful for other things, such as studying wildlife.
Reflectors are generally more unwieldy.
There are exceptions to this rule. There are modern reflectors with more sophisticated optics, which offer the convenience of the refractor with the large mirror and light-collecting power of the reflector. These telescopes, such as the Schmidt-Cassegrain and Maksutov, are wonderful instruments, but are expensive. Make sure that your telescope comes with a good, solid tripod and is mounted so that it is easy to point. A good mounting is at least as important as the telescope.