Sorry, a thousand calories an hour for a low impact machine is not very realistic. Here is my blog where I examine the elliptical and why Spark's calorie burn for it is so vastly over exaggerated: www.sparkpeople.com/mypage_public_journal_
Toes falling asleep is due to the constant pressure. While walking or running you lift your foot every step, but on the elliptical it remains under pressure the entire time. Try lifting your feet, alternating lifting heels and toes, and just shaking them out now and then.