While looking for some horses i found this sight.
www.frontrank.com they sell some very nice medieval miniatures which would do very well for dol armoth cavalry. You need to buy the horse and the rider speratly and together cost 2 british pounds, or 4 dollars. They also sell guys on foot that look the part of dol armoth knights, they cost 1 british pound.
Anyways here are some pictures of different minis i thought looked good.
http://www.frontrank.com/big_pictures.asp?prod=153&pn=3
The guy on the left could easily have wings sculpted onto his head.
http://www.frontrank.com/big_pictures.asp?prod=49&pn=1
The guy on the left would look great with some wings and a swan on the shield.
http://www.frontrank.com/big_pictures.asp?prod=65&pn=1
These guys could also do the trick.
http://www.frontrank.com/big_pictures.asp?prod=140&pn=1
These could do well for pikemen
They sell pack of guys for a slight discount, a pack of 12 knights (horses+guys ontop) cost 28 pounds
A pack of 24 infantry costs the same but it contains lots of knights that do not fit the part. I may be ordering some from the futer and will get pics up if i do.
As a sample buy i filled up my shopping cart with:
5 Knights
5 Horses
6 Foot Knights
9 Pikemen
This would cost £30.28 or $58 from GW it would cost $110