What are you using it for? If you are not going to stop going down large hills then I would not even get the alivio it is overpriced. On v brakes I also find it easy to get the front to grip hard and much harder for the back, so you could consider the diore for just the back and get something cheap for the front. You should be able to get the deore rear brake for 30 bucks and a cheapo for 10-15 for the front and have no issues, or get the altus for about 17 for the front.