I am no expert in exercise, but just to mention don't forget it's what you eat as well.

If you look at http://www.drfuhrman.com
or http://www.tcolincampbell.org/
or http://www.healthyat100.org/
or http://www.processedpeople.com/
or http://www.vegsource.com/
you will see how much weight - and HEALTH depend on a good diet. I have recently lost about 20 pounds on Fuhrman's "eat to live" diet, and I am exercising as well, in fact I am about to ask a question on it. Good luck with your weight loss! Oh and what you do sounds fine to compliment healthy eating, but my gym told me to increase the weights progressively if I wanted to build up muscle.