I would use the 45 degree adapter, you can get them from some of the vendors that post here or from the local hose or hydraulic shop.
Most hoses will not be as flexible as the 1/4" hose you are talking about. I have used them for different purposes and always went back to the 3/8" or 1/2" hose as the 1/4" hose restricts flow too much and loses a lot of pressure, especially when using the surface cleaners.
I have always had good luck with the Goodyear Black Neptune hoses, a lot of times the colored hoses will leave color marks on concrete and other things they rub up against, especially when using hot water. Some brands leave more color than others, I stick with black and gray most of the time.