Have a look at the Hexon 2 range from Kallistra, not cheap but works well and packs away nicely. Some picture on the joy of six posts for 'Break the line'

Regards 

Tim

I have just set up C&C Quatre Bras using Kallistra Hexes and Baccus 6mm figures. There are other battles on my blog too. Kallistra hexes are 10cm. GHQ have 4-inch hexes. Lots of pics here...

http://keithswargames.blogspot.se/2016/09/battle-of-quatre-bras-in-6mm-part-1.html

I use 5" hexes (approx 12.5 cm), which allows for 2 standard bases (3*6cm) abreast and deep or a column of 4 deep.

Also the standard C&C size fo 13*9 hexes fits still on a 4*6 foot table...

Have a look at the post on Dresden 1813 in the Gallery thread. The use of trees and bushes is quite attractive without a massive outlay on specific terrain systems. Another system I have heard of, and am thinking of using, is mapping pins, with the heads painted in various shades of green, brown, grey and buff so that they do not look too obvious on a wargames mat (admittedly I have sprayed my light green mat with darker green and a tan colour to break it up).