Spring Upgrade

been doing some reading and still confused. Real quick (if possible) what brand of springs should i consider for a quick upgrade to my stock 2012 RZR 800 50". Its a pretty rough and squeaky as all get out ride. when i have a passenger i want them to be like yeah, this is a nice ride man not awe dang this is rough as all get out…and buy a can of lube or something..my ears are killing me. LOL..i love my RZR though. Im not looking for a shock replacement. I want a affordable quick and easy spring replacement. I see stuff on ebay but dont know if i’ll be able to feel a decent diff installing those. they run about 250 for 2. so im guessing a $500 upgrade.