Best fabric protectant?

Just picked up my 2007 Touring Package # 5 on Monday. Thus far I have a pile of Zaino supplies, the door guards, OEM rubber mats, and my bumperdefender guards and nobump bumpers are on their way. Not wasting time taking care of my new pride and joy! This forum has been a great source of information.

Curious though as to the best fabric protectant for the Prius interior between Scotchgard and the 303 HiTech Fabric Protectant. I've heard good things about both but sure which way to go.

Would welcome any advice!

Thanks.