We are moving to that area this summer as well. We looked at Tuckahoe Elem. and really liked it, but were concerned about the middle school too. Currently our kids are in catholic school so we decided to continue the tradition.
After a waitlist, we were just informed that our kids got into St. Bridgets. My eldest is going into 5th grade also and that was the hardest grade to get into at St. Bridgets. St. Bridgets is suppose to be an excellent school. I called the high school that my kids would go to in Tuckahoe and asked the guidance counselor what the saw in the kids from St. Bridgets coming to the public high school. They raved about them.
You may want to do Tuckahoe Elem. and get your kids on the waitlist for St. Bridgets for '09....or maybe they still have room for next year. The cost for 3 kids I think is around $11,000. You get a bigger discount with each kid as long as you are a member of the church. We are joining the church now.
The area around University of Richmond is wonderful with lots of space....you are picking a great place in my opinion! Because I am doing the same thing
Good Luck!!