Hehe, you put your hand in the hornets nest Nobody, expect to be stung a few times 
I agree with Thomas there is no point of having a religion if you do not believe in the afterlife. After all why live a moral life, when you can live a life of pure indulgence, sex, intoxication, drugs, rock and roll. If this life was all there is and nothing after, I would do that. Moreover such a belief really devalues life, the idea of underming another or even harming another is justifiable, because after all we only have one life and it all ends at death, so why bother about what others think or what have suffered at your hands. There are plenty of people who think like this and they go onto become serial killers, rapists and criminals(not at all claiming that all such people are atheists lol)
We have a body…that’s where our five senses, mind and memory resides…agree so far?
You are right about the 5 senses being in the body, but not about mind and memory. The mind is not in the body otherwise I would be able to open your body up and see your mind. Now we know that even memory is not in the body, a current and leading scientist known as Karl Pribram has demonstrated that memory is non local, it is not in the brain or in the body. Look his research up and revaluate your beliefs 
So, if the soul/spirit cannot feel pain or pleasure (because that’s an attribute of the body) if it cannot remember anything (because that’s an attribute of the mind)…how can it suffer in hell or enjoy heaven?
It is the mind that feels pleasure and pain and it is the mind that transmigrates. The Atman is very different to the Jivatman(which is the mind) You are the mind and you will certainly experience the heavens and hells. If you doubt me, take some LSD
You will remember every detail of your trip.
I have also read stories about those who have claimed to have had past-lives
We are not talking about just random accounts of past life memories here, but significant scientific research into past life memories spanning continents with over 2000 subjects. How do you explain an evangalist caucasian Christian in America remembering their past life(against their beliefs) as a farmer in India, giving details of what village they lived in, the house, the family, the contents of the safe and very private details only known by the person they claimed to be in the past life. In addition, having a physical trauma in the part of the body where the person in the previous life had taken it. There are hundreds of cases just like the one I described.
Again investigate yourself and revise your beliefs accordingly 