I am trying to register a domain name and webhosting, but am wondering if this offer is any good?

http://www.siteground.com/hosting_features.htm

I am thinking of signing up for 2 years, which comes down to $144 for two years.

500 GB however seems unnecessary, 10 GB would be more than I would need for my site.

Is there something available which is better for me

Hostgator coupon ...