Digilent's Analog Discovery is a combined PC based scope/AWG/logic analyser. I wouldn't usually recommend a PC based instrument, but I will make a notable exception in this case. I regularly use when I'm travelling, on the train or plane (but be careful on a plane, you might get some interesting attention!)
Depending on your educational status, there are discounts. Alternatively, Microchip Direct seems to offer it significantly cheaper than anywhere else for a commercial sale.
While the scope bandwidth only states 5MHz, in practice it's a lot more, especially if you use the add on BNC adapter with proper probes. I measured it at 33MHz, but keep in mind the sample rate is only 100Msa/s.
The reason it's highly rated on here is not just the price and hardware features it offers, it also has really good software, something sadly lacking in my experience in many PC based instruments.