It says you're putting with a scotty cameron right now? Don't get rid of that putter (unless you want to sell it to me)! If putters were cars, Scotty Cameron would be making Ferrari's :smilie_ti (sorry...bad analogy). I personally have a scotty cameron putter, but I really liked the Odyssey 2-ball putter when I used it recently. Also, for something somewhat unconventional, look at the Ping Doc-17. The head is huge...I only putted on a practice green with it, but it felt pretty good.
I had this same issue recently and after trying virtually every well known driver out there (literally! I took 3 months deciding!) i chose the Odyssey White Steel no. 2. Its outstanding and really easy to line up on medium to short putts. Also fantastic on long putts if you are a 'spot' putter like i am. I tried the two- ball but found it hard to line up on anything over 5 feet.
I bought the white steel no.2 from Nevada Bobs for GBP79.99.