I am one who is torn between 6mm and 10mm, fantasy and historical. I admire GW for bringing the hobby to the masses and setting the standards for modelling and painting we see across a variety of companies now. I like the idea of Warmaster but have been toying around with bases and rule systems - and this is pertinent to the discussion at hand.
As I like the concept of the 'Might and Reason' ruleset I like to base my minis in one unit to a base style (ideal in 6mm and even 10mm). Then the question becomes what size unit... 40 x 80mm is nice and simple for your 40mm strips - but your command team will be out to one side

--- 30 x 60mm is nice for gaming but 40mm strips just does not work.... unless the figures can be seperated out and moved around.
In the 40x80 bases I have done some GW Warmaster bases which were fine until I did some Copplestone orcs which although cast in strips are generally easily seperated and moved around as needed. Best of both worlds - strips made it easy to paint and base and the fact you could seperate models at any point in the base makes them as flexible as you want (so command team front and centre). Just dissapointed that the Copplestone archer castings mimick their GW counterparts by being cast joined one behind the other - singles for archers is a real must in my book.
As far as 6mm goes the 2cm strips produced by Baccus is the way to go - again you also get strips of 'individuals'. Although I must mention Rapier's (part of Newline designs) ancient 6mm which I think are fantastic in detail.
As far as Kallistra and Pendragon go --- they are the same models (something that confused me at least). To my understanding when one of them left to set up Kallistra he had the same rights to the models as Pendragon --- and with the TSS scenic system adopted them onto 40mm strips (again in the main seperable if needed) for H&H.
... if you are looking for ranges of 10mm fantasy to do..... please give us some iron clad stomping Dwarves, mail, plate-mail, plate, runes.... and give them swords so they can go stick some gobbos...