I've been doing pretty much exactly what you're considering. my ride in is an hour, and it's 1:15 coming home. so, nearly 2 1/2 hours of exercise per day.

sounds insane, but my driving commute would be an hour each way and even a bit longer on public transit. so, i'm actually SAVING time b/c commute + 1 hour in the gym would be 3 hours per day.

and I'm dropping pounds / getting stronger like crazy.