I voted for "Not that keen on any" option.
But if I had to pick, I would go with RateHound. Atleast its short, catchy and distinct.
YeahCompare sounds too similar to youcompare. And if your trying to build a brand...I guess you wouldnt want that!
Oddly enough I had the same intentions as you and recently purchased PennyPincher. But still a bit iffy on the name.