I have stayed at a deluxe(AKL), a moderate (CBR), and All Stars and Pop. To me, the mods add very little value for the extra money. Ask yourself these questions:
Are you appalled by the food court at your mall? If so, you won't like Values.
Do you plan to do any recreational boating? If so, Moderates may be for you.
Is a Hot Tub a special treat that you enjoy, but usually don't have access to at home? If so, the mods may be your move.
Now, also ask yourself these questions:
Is WDW Bus service important to you? If so, go with Pop. It just has one Bus Stop, that is fairly centraly located. Buses at Allstars and CBR often make multiple stops, slowing the whole commute process. (unsure about Port O)
Where have I stayed at the Disney resort before? Will the value be a let down?
Am I willing to walk an extra 50-100 yards to have quiet? Don't pay extra for a preffered Value room near pools and food court. Request a standard room away from pools, fourth floor is best.
Just my opinion. If I was going to go up from 100/night to 175/ night to stay at a moderate, I would just go ahead and stay at deluxe, and try and find a way to get it at a discounted rate,sometimes as low as 200.