Tektronix is the 'gold-standard' for oscilloscopes from my short-lived career so far. NASA SSC uses them, my University uses them, and I know of a few businesses that use them as well.
Agilent, another well known electronics company, produces them too. However, I do not recommend their oscilloscopes based on the experience I've had with the ones in our senior design lab. They do not have a very responsive UI, which drives me insane when moving the waveforms. Do they work? Yes. I just don't like the UI responsiveness of the ones we have (I can't remember the exact model). Agilent makes great bench multimeters, and they are the 'gold-standard' for function generators, just not oscilloscopes.
For a cheap, new oscilloscope, I would recommend the Quant Asylum QA100 USB Oscilloscope. We also have those in our senior design lab. They work pretty well, and the software works much the same as a normal oscilloscope. They run $350, which is cheap for an oscilloscope, but they do have some restrictions, so check to make sure they'll work for your application.
http://www.quantasylum.com/content/Products/QA100.aspx