that will do just fine !!

the 'standard' minimum for 5 boxing is
dual-core processor
2gig ram
'decent' video card

will give 25-30 fps outside
15-20 fps and lag + loading lag in towns
but doable

the 'standard' medium is
good dual-core processor, or quad-core (process affinity, more cores to divide the 5 wow's to)
4 gig ram
good video

30+fps in towns, with clones 'maxed fps' on 10
almost no load lag
good enough to pvp with

and the over the top pricey i want i likey minimum
latest quad core
8 gig ram (need vista64)
latest video card

50+ fps on main + clones
no load lag
pew pew pew

But of course, others are with the
'and the over the top pricey' pc for main char
and 4x 'the 'standard' medium' pc's for the clones

... ill start saving those penny's