I typically use Firefox but do, on occasion, use IE just to
a) check website displays,
b) login to something as a different account or user that I'm already logged into with Firefox,
I'm familiar with the features of IE7.
I don't really need new features, so I'd only upgrade to IE8 if
a) the security is significantly better (yes, I do run firewall and anti-malware software),
b) it uses less resources (haha, doubt that one),
c) or some other significantly good reason for the little use I will get out of it.
... so is there a wonderful reason to upgrade?
PS. If it helps to know, the machine I'm speaking of is:
Pentium 4 CPU 3.00GHz
1 GB Ram