I would do the recumbent bike. High intensity intervals. 20 minute sessions. One before breakfast, one session before bed.
I'm only interested in burning fat. The only way to do this efficiently is to activate the hormone Lipase, which allows the mobilization of bodyfat. You gotta be on a somewhat low carb diet. If insulin levels are rockin out with its cock out, the mobilization of fat out of the adipocytes is damn near impossible, even on low calories.
Low carbs + HIT cardio drains glycogen stores and burns fat. End of story.
I can get on the internet, play guitar, whack-off... whatever- on my recumbent bike.