SPQR:TW is a good mod I made that is fun if you like Realistic Long battles and are not too concerned about historical accuracy. I noticed on .Org is mainly dominated by EB and RTR fans. twcenter has more variety of some nice mods.

Historical Accuracy goes to EB and RTR, but personally I feel too much accuracy ruins Gameplay. There arent alot of SPQR fans that post here on the .org as most who play mods are not Modders themselves. As for the .Org I always considered it the MODDERS site. lol There is more information on how to mod here than TWC, but TWC has more Mod PLAYERS and descussions and their favorite mods IMO.

Anyway if you think SPQR may be your cup of tea, check out this forum. SPQR was one of few that was along with EB and RTR from the beginning. Though EB would technically be the longest since it was before RTW was released. but I speak from the actual release of RTW. I came about 2 months after RTW was released, I didnt really see EB around at the time until Trivium stepped in an gave it a jumpstart. Gaius Julius was Working on RTR and Since most of the players like 1 turn per unit and playing on Large settings. I decided to Make my own mod and thus the birth of SPQR:TW.

Asking what the BEST mods are is kinda silly because alot of people have different opinions. Best in What way? See that is the problem, as the second post above stated 5 mods, when I feel there are alot more than just 5.