Congrats on the reo pick up.
AW 1600 or 2200 mah from RTD would be the route to go. Not the 2000 mah unless you have to (for some reason) as they have a lower amp rating. The 1600 is rated for 24 amps max cont. drain (compared to 20 amps for the 2200) and is the prefered bat for those getting low in build resistances, which is prolly a moot point for you. Some feel that the 1600's keep a usable charge (>3.7V) for the longest, although I don't find any real difference in that regard.
Button tops, like the AW's, might be better for metal reos than flat tops due to arc'ing with the firing pin, which can be exacerbated with some build and button use styles. With a woodvil reo, though, flat tops work great, which maybe gives you more options (e.g., Samsung 25R, Sony VTC4/5).