hey do you think i can get away with upgrading my rear shocks from stock to agx's while leaving my front stock?

right now my fronts ride really good and i dont feel the need to upgrade my fronts, but my rears, during a hard corner start to bounces and my tires skip.

 

Not really a good plan to do one end and not the other as a long term plan. If you need to replace them in pairs to cut the cost in two and spread it over a short period of time, I'd suggest that you do the fronts first and then the rears. Stock shocks are really good for nothing other than getting through the warranty period and in general not needing to be replaced by the manufacturer during that time. To mix the design, function and engineering decisions end for end on the car would not be wise, somewhat like running radial tires on one end and bias ply on the other. If you do this kind of thing, put the stiffer ones on the front.

If you make no performance control demands on the stock shocks, then they can last longer but really aren't made to do much more than the bare minimum and last through the warranty.

By the fact that you are asking this question on the Road Racing/Autocross forum, you probably have some performacne interests at which point going to better shocks will bring more out of your car. Replace as a set is best but fronts then rears if you muct split them up.