I own the A2, L4 and the L1 (Cree), and out of the three the A2 is my favourite. It is also my EDC. There are plenty of threads detailing the wonders of the A2, so I won't go into them again, but rest assured it makes a very useful, versatile EDC
So, unless something specific about the L4/L1 interests you, I would say go for the A2. The L4 gives a beautiful wall of light; the beam is almost enitirely flood. Not much use a distance but great for close-medium range. The A2 is a bit larger than your E2D, so if you don't want to go any larger than that then i suppose you're only choice left out of those three is the L1. However, I find the size of the A2 to be perfect. I don't notice it in my pocket at all. The long pocket clip really helps, too.
As for the LEDs in the A2, I'd suggest white if it is going to be your EDC. The other colours are far more usage specific and won't be as useful in general, day-to-day tasks. The possible exception to this would be the red LEDs, in my opinion. It boils down to what you value more: a nice low beam for indoor/close illumination for general tasks, or a red light to preserve night vision that won't be as useful elsewhere.
Whichever you choose, you're getting a great light
Regards,
Tempest