Rear bearing kit

My old rear end was howling by the time I took my car down the dragstrip a couple times after I first bought it and in stock form, the previous owner had some issues but he had it fixed thru warranty.

So I bought the Ratech Deluxe kit from Summit for like 110$ and had it installed and I havent had an issue since. It was a quality kit and install too! I recommend the Ratech kit personally, I am very pleased, now I just need to upgrade to a taller gear...
 
I had all the bearing replaced when I had the gears done. I had issues with a bad pinion so he swapped out everything. Now the noise is back but I've probably put 100K since then. I just want a kit that comes with everything so I don't have to piece it together.

Got a quote for 300 labor. Anyone think that is good?