I needed something that sits on top of a regular desk. Started with cardboard boxes for testing, but then I got something from Ikea that is actually a large sturdy shoe rack (I wanted a mid-level shelf for a keyboard tray). Ikea's great for stuff like this -- it's like furniture Legos :) I looked at the office furniture, end tables, tv stands, etc. but the shoe rack was the best fit for dual monitors and height.
Also got a barstool for occasional breaks of sitting, like if I eat lunch at my desk.
Only on week 2 but loving it :)