hey guys! just wondering what kind of ball machine i should get. I am a 4.0ish player and i hit with power/ spin- i need something that will challenge me and give me a tough workout. i am working on consistency/ variety shots 4 my tournaments/ season. I will prolly be training with it for at least 3 hrs a day everyday...so something that does more than just oscillate, however, i can't break the bank with it. Thank you so much!!!