Thanks so much everyone for the replies!! I am most likely to pick the Voyage for text crispness as I think my main problem is with text on my current ereader looking too "soft" even with bolder fonts. I hope the Carta is also a noticeable change from Pearl, even if subtlety. 
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					Originally Posted by  Nausicaa
					 
				 
				Try an OLED display at night. It gets dimmer than any eink with frontlight I used. I can show screenshots but its basically mostly black since you can turn off every individual LED, and you can set the text to a color like red that doesn't disturb your night vision. Something like a samsung tablet or a phone you had lying around. 
			
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 If you can take a pic I would appreciate that, so I can get an idea of how dim it can go while being readable. Have you read a lot under these conditions without disruption to your sleep? I really like reading on my iPad but notice my insomnia is worse spending too much night time with it, unfortunately. Haven't tried red text yet though.