Tell us more about yourself, do you need a long warranty? Is support critical for you? How much money are you planning to spend? These are very useful questions for us all.
Now, remember Tektronix doesn't have a very deep sampling memory, but support is on par with Agilent, I think. Agilent is a good choice, but it will cost you a lot of money. The Agilent DSO1102B is actually a rebranded Rigol oscilloscope no longer being sold by Rigol. You will get superior support, of course, compared to Rigol. The DS1102E is the cheapest option and it is very well known by this community.