Ebor are nice figures in themselves, scaled to match Foundry and so smaller than Gt War and Warlord? They are detailed enough but the range is very limited, which lets them down. They are cheaper than Foundry, so a good economic option for buying regiments of foot, to which you can add artillery and guns from Foundry.
I have Gt War British infantry, cavalry and artillery and Warlord plastic Russian infantry and metal artillery and Gt War Cossack and Russian skirmishers. I find the ranges mix well enough. I really like the plastic Warlord Russians and it was these becoming available that really got my Crimean project off the ground.