Thanks again to all of you for your helpful advice. These were the final candiated on our short list
1. Wal-Mart Hydro Spa for 3298$
2. CostCo Discovery for 3699$
3. Caldera Oasis II for 3695$
We decided to go with the Hydro Spa product. I'll let you know how bad or good our experience with Wal-Mart and Hydro Spa is. Thanks again