I love my CC, cash gives me nothing, CC give me rewards for using it. Everything I possibly can buy with a CC I buy with the CC. I just make sure it is paid off at the end of every month, in the 12 years I have had a CC I have never carried a balance forward to the next month. In return it has given me free trips and other things. ;D
I fully agree pay of the CC first, if you put it in savings you are getting like 2% per year, so you will still be loosing 16% (based on an 18% cc) on the balance of that card.
Tv's are always on sale, it is best to be able to have the money before you buy one.