I haven't heard of anyone being happy with Hughes either. Is regular phone service out of the question? If your upload and download aren't high enough Vonage won't work right, but I guess you figured that out already.
EDIT: Requirements
* You must have a high-speed Internet connection (cable or DSL)
* You need a US or Puerto Rico shipping address (no PO boxes)
Once you sign up, we will ship your startup package within 5 business days. To start saving, simply connect your telephone to your high-speed Internet connection using the Vonage phone adapter. Pick up the phone, and use it just like you do today!
http://www.vonage.com/call_plans_residential_premium.php?lid=residential_premium&refer_id=OLNSR080801004W1