First or second, really. Teledyne LeCroy are shiny to look at, but super expensive for what you get, and don't always have the best UI.
I'll also put in a vote for Rohde and Schwarz, at least for the really really high-end gear.
@zetasyanthis yeah we appreciate Rigol's existence for making things way more accessible to hobbyists but for professional work it's not good
-F
@Felthry
Agreed on all points. And I don't discount them completely. They do good work, they're just not world-leading, which is admittedly a hell of a high bar.