Gripping Beast is going to have an edge in sculpting quality. You can pick them up in the US at
http://www.architectsofwar.com/grippingbeastplasticvikinghirdmen.aspx for $32 per box, or 73 cents per figure.
For WGF, a place like the Warstore may be the best option with a discounted price.
http://www.thewarstore.com/product53506.htm
$16 per box or 50 cents per figure.
As for rules, you will be spoiled for choice. Gripping Beast just released Saga - which is a skirmish scale Viking game. I have not seen the rules, but first shipments to distributors sold out quickly.
Wahammer Ancients with the Shieldwall army book is (or was) a popular option. Depending on who plays in your area, you may also see Clash of Empire, or War and Conquest.
At the moment, I prefer Hail Caesar as a mass battle game. It's fast moving, easy to pickup & becoming quite popular if you follow various ancients blogs.
There are dozens more games for this period - should not be too hard to find additional reviews.