I am comparing Agilent, Rigol and Hameg right now (2000 series levels).
I would be very interested in reading your comparison, please do post when you're ready.
oh. sorry. I am comparing them in consideration/hopes of purchasing one of them. As such, I will only be able to really learn about the one I purchase. Compared to that my only other references are the Tek scopes at work and my analog Tek at home.
So far the main difference is that Rigol does not have 4 channel yet nor the mixed signal but I assume and hope it is coming.
Hameg
has low noise front end
does not have uber-high waveform per second rates.
small screen, but built in DVI output - yeah!
only 3 analog channels when you hook up the digital
vendor and manufacturer Support? tbd.
Agilent
Really attractive pricing right now
large screen
individual vertical controls
CAN decoding will be part of the April 1 offer (pretty sure) and this is attractive as I might peek at the signals in my TDI
good support from the vendor and manufacturer (based on my experience with the DMM)
I think in the USA Agilent is the way to go if you want mixed signal and more than 2 analog channels as I do. But of course each person is unique.