The USB and handheld ones are great and can be had for less than $100. The Hanteks can be interfaced with open source software which is great since you get a ton of features that normally wouldn't be included in budget models (like wire protocol decoding). As for benchtop models, Siglent and Rigol are going to be the most affordable. There's a way to generate license keys from certain models if you care. Obviously Tektronix and Keysight are top end but are like 10x the price of Siglent/Rigol.