Upgrading 17" to 20" tires/rims

[dumbazzray]

I am newbie to the forum so I will be asking alot of dumb *** questions so bear with me. I recently bought a 2008 fully loaded LT (LT3 package). One thing it didn't come with was the 20" polished alumunum wheels. I want to get something nicer wheel wise. The dealership has (4) 20" polished aluminum w/Bridgestone Dueler H/L Alenza which they will sell for $1,500. I know what the tires are worth but can't seem to find what the rims are worth. Does anyone know ? Not sure if the polished aluminum is what I want anyway. Also can't seem to get a answer if the pressure monitoring valves from the 17" can be used on the 20".
I may want to keep the 17" wheels and just buy new rims (chrome) . Any quick comments on 17" vs 20" tires (pros/cons). Names of reputable websites/major chains to look at different rims.

Thanks in advance.
Ray

 

[metelhead]

If you look on ebay you will see the offer your dealer is giving you on the polished 20" is fair good- quick and simple way to upgrade!

I decided to go the other way for now...I bought a set of stock steel 17" with caps which I'm having pwder coated black for that rugged look....truth be told I would love to get a hold of the 20" polished wheels and have them anodized Black- that would be the sweetest look imo.