Your best gears for the buck are your Motive street/performance series.
http://store.summitracing.com/egnsea...6&autoview=sku
Be careful on the gears you buy. Stay away from the "drag" gear as they are too ductile and soft for street use. When you order your bearing kit you'll need to know whether it's 28 or 31 spline, pinion shaft crush sleeve or solid spacer/shims and your existing carrier bearings' OD of the outer race.
I'm assuming that you drove it without rear lube for a period of time. If so and you have rear differential fluid lubricated axle bearings they made need replacing too. When you pop the axles you can do a closer inspect on the bearings. Look for bluing or other signs of overheating (melted seal lips, fried grease etc..).
You might want to take a look at your posi unit too. Some of the crate rear end posi carriers were crap from the start. Without a doubt, the Detroit True Trac is the way to go if you decide to replace it. I've one in my 9" now and both axles grab enough to yank both front tires.
Depending on what your ultimate horse power goals are and if you now have a 28 spline setup, this would be the optimal time to go 31 spline ... and to provide your own contribution to our much needed "economic recovery stimulus".
Dave