I am sure many will pipe up with other solutions, but a couple to look at in your price range are the bc1hu and the bc2hu made by Vanson but sold under many brand names. Harbor Freight occasionaly lists the bc1hu for 19.99, but it is 24.99 right now (plus shipping of course).
I am very close to biting the bullet on this one:
http://batteryjunction.com/v1ec-bc2hu.html
For about 89$, this is a wonderfull charger, or so I have read at least.
Maha MH-C808M. I know that is quite abit above your budget, but you would have it a long long time, and the added feature of balancing your cells and such would probably greatly extend the life of your expensive batteries.
La Crosse makes a very nice charger for the money, but to the best of my knowledge, they are limited to AA and AAA.