Differences, if any, between HDMI cables is a controversial topic, but I doubt if image blur is a cable problem.
Do you have any unnecessary picture processing, such as noise reduction, turned off? According to reviews, the G10 is excellent for games, unless:
Do you notice the blur in anything other than games? If so, it could possibly be that you're one of the small number of people susceptible to 'phosphor trails' on plasmas. Quote from another website:
One thing to note is that the common Plasma issue of phosphor trails will rear its
head, depending on what you're playing.