'TV' doesn't really do the E6 justice. It's more of a televisual instrument. When watching HD content the eyes are fed such a plethora of highly nuanced detail that you can almost feel them making hundreds of miniscule adjustments in order to process what's in front of them. The E6 really is a refined piece of equipment. SD material is also very impressive and occasionally I have been fooled into thinking I was watching HD.
I also have the L32E5B and find the E6 to be much better overall. For a start the calibration controls are much better. The E6 is fitted with a backlight control which really helps adjust the picture to your tastes. Most significantly, the E6 is also able to produce bright and punchy pictures akin to Samsung and LG as well as the warmer picture usually associated with Panasonic TV's. You get the best of both worlds. However, the E5 uses a different panel(IPS) which is much better for a wider viewing angle. The E6 uses a VA panel which gives better black and contrast but a far narrower viewing angle.
I measured the viewable screen size diagonally and found it to be 38.5". In fact the TV is surprisingly small. I found that the best viewing distance to be about 6 ft. If you are thinking about a 40" TV then I would give serious consideration to the L42E6B as the overall size of the TV is reduced by the slim bezel. I myself have decided to upgrade to the 42".
The build quality is exceptional and the minimalist design is bound to stand the test of time too. Added to which is Panasonic reliability.
Overall, I think it is safe to say that Panasonic have produced an absolute gem of a TV. Remember, don't be shy when it comes to the size!!!
update. I have been watching blu rays for the first time on the E6. The truth is blu rays look good on pretty much any HD TV. What sets the E6 apart is subtlety, contrast and clarity. I have also seen the same blu rays on a Samsung F5000 and can honestly say that the E6 is in a different class altogether. The HD picture on the F5000 was maybe TOO sharp which made the image too artificial and a little two dimensional. With the E6 you get clarity but also a wonderful sense of depth to the picture. This is because of the increased amount of detail in dark areas that is just not there on the Samsung.
I think I have just found the perfect stand for the E6! Its even 95cm wide the exact same width as TV and has a very similar overall aesthetic;Ovid OV95W - LCD & Plasma TV Stand up to 50" - Gloss White