Yes, the Maha CH-801D is definately the way to go. It has the best proecssor in the industry for a "soft charge", as well as the best conditioning for recovering, or increasing the longevity of batteries. All Maha units (4 or 8 cell) are very reliable in terms of knowing you truly have a good charge when the charger says so. I used to be nervous about "mission critical" recordings and using nimh batteries. Now, with the Maha chargers and Energizer AA (2500 mah), I am pretty darn confident.
The Maha chargers seem to be recommended more than the LaCrosse ones in all the reviews I have seen in photography type magazines.
What are folks experience with 2500 mah AA's and the ACM 671 w/ phantom power on? How many hours can I RELIABLY expect? Have people found better quality AA batteries than the Mahaenergy or the Energizers?