I am a moderate Calvinist, but I prefer the term "reformed" as I don't want to be associated as a follower of John Calvin, only as a follower of Christ.
I consider Arminians as fellow brothers and sisters in Christ even though we may not agree with each other. The arguments between the two views is dividing the Church when we should look towards unity.
There is nothing wrong with adhering to either Calvinism or Arminianism, as long as we are not dogmatic about it. I don't think we are meant to know exactly how salvation is meant to work, rather our primary focus is to evangelize to the unsaved. We are humans, and we are prone to error, and it seems arrogant to assert one view has everything figured out.
There are things that both camps can learn from each other, and I have been thinking that we should work together to help us overcome the weaknesses of each view.
Neither view itself is heretical, only the extreme views on both sides are heretical.