RBM2 provides a powerful base for status bars. What does this actually mean? It can track your cooldowns, buffs, debuffs, and just about everything else you can think of. RBM2 currently has modules that provide similar information as NECB, DoTimer and other cooldown/spell tracks, but gives the power of customization to you.
RBM2 is extremely customizable, allowing you to change textures, locations, anchors, or you can just leave it at the defaults and it's ready to go. You have the ability to make any number of frames that you want, have bars travel from one frame to another depending on time remaining or percentage of time remaining, all with different styles. You can also setup sound events that will alert you when certain bars are almost over.
Additionally RBM2 has support for BossModules, and by default comes with a plugin that optionally converts BigWigs bars into the RBM2 system.
RBM2 is lightweight and unintrusive, it promises not to bog down your game.