Sounds like someone didn't do a very good install for you.... I sell and install StarBand, I have never saw speeds that slow! I have upgraded customers from the 360 to the Nova Pro and the new Nova 1500, they have been very satisified with their speeds.
I have the Pro plan here at my house and the Ultimate at my store. With the Nova Pro the advertised speed is up to 512 down and up to 128 up - this plan has been replaced with the Nova 1000 with up to 1024 down and the 128 up.
The Nova Ultimate was 1024 down with 256 up, now it is the Nova 1500 with up to 1.5Mbps down and 256 up. The price plan has went down with the 1500 plan, it was $129/mo with 12 month contract now it is only $109/mo with the 12 month contract.
StarBand has announced that upgrades will be available for current Nova Pro and Ultimate customers on Dec 17. As I have understood, the upgrade fee is going to be $150 added to your bill.