If you're talking HDMI vs component (red/green/blue cables) you probably won't see a huge difference on your TV, but if you're talking about HDMI vs composite (yellow video cable) it's a huge difference. Just for cost and ease of use I'd go HDMI though and get the cheapest cable you can, digital is not like analog, it either works or it doesn't, there is no degrading of picture quality because of crappy cables.
I buy HDMI cables from Monoprice online for 5 bucks and they work great. Don't buy into any monster cable crap.







