As chris has mentioned, decide what kind of shooting you do. Is it woodland, where shots will be a bit closer and a bipod wont do, is it flat fields where if you lie down a bipod might be dangerous, or is it open undulating ground where theres plenty of places to lie down with a bipod?
I have all so i use both.
Im not a fan of these removable bipods, just too much faffing about so i use a harris and my sticks are a set of vipers.
I did try a set of the hill quad sticks for a day and was mighty impressed by them.
Just depends on how much you want to spend.