consider the gift card deal, though it offer 20% off, personally i won't go for it, esp. big ticket item like Wega TV.
I'd prefer to paid by credit card for an insurance (though 20% is debateable as it's a lot): like the extended warranty, price protection that they offer, etc.
Your mileage may vary
If partial of teh product is paid by GC or by other means, not FULLY paid by CC, you lose teh protections from CC.
That's why I always be careful about using AMEX and Staples coupon together because with Staples coupon used, AMEX card was not charged for teh full price, thus they are not obligated to honor the price protection. that make sense, e.g. you buy a $200 item using $40 coupon, AMEX card was charged only $160. price dropped to $150 and assume merchant won't honor the price match and you seek $50 price protection from AMEX, it's not fair to AMEX to give you $50 as your charge was only $160 (31%) instead of $200 (25%).