I recently bought some Micro Art Studio bases from All Sorts Emporium. I wanted something swampy and gurgly and Micro Art was the only manufacturer that I could find.
http://www.shop.microartstudio.com/swamp-bases-c-3_49.html
The quality is superb and there is an amazing range. The only feature that I have added to these are the two heads.
The only problem is that they are not cheap - about E1 per 25mm base and E5 for the 50mm base under the Daemon Prince. That is a bit too steep for me, I am afraid, for all but special models - as it works out at about £8.50 of our debased Pounds for a ten man squad.
Still, if you have the cash to flash, I recommend them.
John