Well, I don't know what size pump you are using. I HAD a 09 on my setup. 140' from stove to heat exchanger on furnace. Had to bump up the second year because the temps that year were colder and the water didn't circulate fast enough.
Others with about the same set up use a smaller pump. It all depends on how it works once it is actually put to a test.
I know that this doesn't really help you much. Your dealer should be able to give you a pretty close idea of what to use. Most of the time they know or are only off by one size.
When you run your stove on the first really cold day and you can't keep the house warm and there is nothing else wrong, bump up to a bigger pump.
That all said, what you have should be fine, even with a grade. 30 gallons a minute is a good amount. Should be plenty. My stove is actually about 5 0r 6 feet above my house but I have my pump in the cellar. Easier to change if it stops working when it is 5 below zero.