You will almost never hear anyone say that they bought the wrong type of telescope. More often, you will hear someone muse that they bought the wrong size. It is common to wish that you had a bigger telescope. That's why we always recommend that you buy the biggest size aperture (diameter) that you can afford. If that means a good 70mm refractor , (made by a reputable manufacturer) then buy it. You will surely enjoy what you will see with it, which is really quite a bit. The 'ancient' astronomers who pioneered the skies, and those who created the catalogs of countless objects that we view today, employed equipment that was far inferior to any decent 70mm refractor that is currently manufactured.