Consider too if you are going to spend time at the resort. It will be hot outside, so a mid day break in a fantastic pool or relaxing at the hot tub may be just the ticket.
If all your time will be in the parks -- stay at a Value.
The more time you spend at the resort, the more you want to select a Moderate or deluxe resort.
WL is a very nice resort and the location is pretty good too! It's a quick relaxing boatride away from the monorail or MK.
If you will not spend a lot of time at the resort and you said your children are youing - go for the value resort and use the left over cash for a downpayment on Vacation Club !