I'm looking for an affordable video head for my SONY FS5. Money is tight, so I'm not in the market for a high end video head, and the Manfrotto 504HD looks like it would be suitable. However, I just read about the Libec RH25D and wonder if anyone has experience with this head. I like that the counter balance is variable, as opposed to the 3 steps of the 504 head. Any thoughts would be appreciated.