Rhonda,
OK, so here is where I would stay with a 7 and 10 year old, by resort class, and why;
Value Resort: Pop Century
I like the lake side location. It makes the resort seem less like a ton of buildings wedged in between parking lots. Not that you are going to do any water sports there, but it does result in a lower ambient noise level than at the other three All-Star Value resorts. Also, the more central location (with respect to the entire Walt Disney World property) makes it a bit better in the transportation department.
Moderate Resort: Port Orleans Riverside
Having boat access to Downtown Disney is a nice plus that can also help with expediting any resort-to-resort travel you may have for meals. The resort ambiance offers more to do and explore for your kids as well, and that is a plus. The dining/entertainment at the resort (all G-rated) also make for a bit more family-friendly of a setting.
When it comes to deciding between Value vs. Moderate, for me then it is all about budget. But I do try to move up the moderate if at all possible.
I am glad to answer any specific follow-up questions!
Have a magical vacation!