Thought to give you an updated, I visited Pedders suspension payed the $28 and everything looked good !!
In fact, they mentioned the following two issues:
1- Lower Control Arm: Bushes torn and replacement required. The gentleman mentioned those would not cause the issue, your thoughts?
2- He thinks that the tires are not perfectly round.
I know that the issue pre-existed before I replaced the tires, however it is sort of more obvious after the tire replacement. Went back to the tire shop and they checked them, done another wheel balance and no issues found.
I am totally lost now with little to no experience in car mechanics, I am not sure which direction I should follow. I don't want to spend a lot of money on those bushes or the struts and then, I would still find the issue.
One note though, a friend of mine drove the car for a bit, and he said it seems to him as if the tires have a groove as the bouncing follows a standard pattern. Now we know (sort of) that the tires and struts are okay, what would be the next thing causing this? could it be the spindle itself?