First good job getting down to bare wood. To make sure that there's no 'leftover' finish or stain, wipe the entire surface with a rag dipped in paint thinner. It will highlight any finish or stain.
Next, the sun and overhead light's reflection off the wood prevents a good look at the color of the wood, so some better pics might help, BUT...
The biggest issue is asking others what color stain to use. This is difficult because it's a personal taste question. To best understand this ask a husband and wife what colors they'd like
Seriously though a lot depends on things such as personal preference, color of other items in the room the piece will be in (are they dark or light, etc.), will the piece be exposed to a lot of sun (sun will bleach out a lot of color from a dark stain over time), etc.
Hope this helps