Buying NTW + extra units in the US

It's annoying how all different retailers have different offers regarding NTW and extra units.

Where do I get the most units for the money? I heard there's a grand battery somewhere from some retailer - this sounds good to me, haha. It looks like it's only a pre-order for Amazon in the UK though, as far as I can tell. Can I get this somehow? Haha.

Steam Imperial Edition has the "Heroes of the Napoleonic Wars" pack, consisting of 10 units. Preorder gets you the Royal Scott's Greys. It also gets you Med II Total War. 50$
"Heroes" link: http://www.totalwar.com/napoleon/add-ons/?u=2

The standard retail Limited Edition (on Amazon for one). Previously mentioned "Heroes" pack + 5 extra elite units:
http://www.totalwar.com/napoleon/add-ons/?u=1
And only costs 40 bucks...anything I'm missing? This seems like a better deal.

Screw special units. They should be part of the game, and I'd normally just wait for modders, except for the fact that I wanna use 'em online.

each imperial edition includes the heroes (10 units) and the elite regiment (5 units)
it depends on the retailer which additional retail unit you get, there are 5 different ones...

Steam doesn't seem to though...has anybody else noticed this?

Steam doesn't mention those though. Anybody else noticed that?
Seems like a bad deal. Honestly I prefer to buy through steam as it's more convenient.

i preordered it on amazon for 45€, i bet americans have to pay less for the imperial edition

In Australia

"GAME" has Napoleon TW Imperial for $109 AUS, which includes Med 2 TW, both DLC packs and the game posters, etc + Some Russian Unit
EB Games has Napoleon TW Imperial for $109 AUS, which includes both DLC packs and some other garbage that no-one wants + HMS Elephat

Steam Has Napoleon TW Imperial for $80US in Australia, which includes one DLC, med 2 and Royal Grey Scots

Which is a better deal?

depends on which additional unit you want to have...