Technically if you're buying by hire purchase, you don't actually own the item until all payments and interest are paid up in full. Actually in the long run, you're paying much more than you actually think in interest. Either hold off that purchase until you have the money or make do with a cheaper option.
Unless the vendor has a 0% interest installment plan with the credit card company, you will still need to pay a 2-3% 'admin' fee if you buy equipment first then call bank and ask them to put it on the '0% interest installment plan. Some vendors such as Cathay Photo, have a 0% interest installment plan agreement with some banks. So if you pay by OCBC, Citibank, or another bank which I can't recall's credit card, there would be no diff if you paid with cash or with those selected cards on the installment plan (price-wise, I mean)