New User - LF advice

[Sajuuk]

2gb more ram
if you want to upgrade processor a bit

otherwise you are fine, if you put your alts on 30fps like MOST people do.

8GB RAM is not a requirement for five boxing. 6GB will do fine, although you might dip into your page file in areas such as dalaran.

Processor is fine. You do not need an i7 rig just for multiboxing. Yes, it does provide a good amount of performance, but there's no good reason to get an i7 rig if you already have a good one.

edit: And there's nothing shabby about 4GB.