So Rubicon is the way to go then? How do they compare to Warlord plastic kits?
Tom,
usually, but not always, Rubicon are more solid, suitable to be moved back and forth, and designed for wargamers.
Warlord, specially when they are Italeri kits scaled down, are more delicate, and with more fiddly tiny pieces.
Due to the kind of moulding, Warlord tracks are much more detailed. Rubicon's are "smooth".
In modeller's words: Warlord is right, Rubicon is wrong!

From the point of view of tracks, obviously!
Rubicon's kits have several options (look at their M10/Achilles/M36/whatever).... turrets, guns etc, but sometimes your choices are limited because there are no duplicate of other necessary parts.
Nothing difficult to duplicate with plasticard (turret ring, etc) or a simple casting or scratbuilding (turret cupola, etc).
In the net there are some great review/tutorial, look at our fellow LAFer SiamTiger posts!
My 2 cents, both are great models, check on the net the model that suits you better.
Hope this helps,
Marco