Howzit!

It's not necessary unless your application requires it... (ie: yours are worn out, etc...).

I've had mine lifted for 2 yrs now and have no need to go away from stock. If you do, consider the Rancho 9000XL 9-way adjustable shocks.
Had them on my previous VX. Awesome upgrade.
(sorry, I know you were asking LittleBeast... just thought I'd throw in my $.02)