Hardware :: How To Use ACD 27inch On Lower Resolution?

I'm thinking of buying an ACD 27inch. Given that I need to view the monitor from a greater distance than normal (music/recording uses) and that sometimes I find the text in some apps a little too small at that resolution, I was wondering how the display looks on the lower resolution for increased text size? I tried it in the store on 1920x1080 and it appeared to be quite readable and the text was nice and big even though the image was not as sharp. I assume this is the same as running a 24inch ACD in terms of real estate but with bigger text. I think the ppi would be lower for the 27 inch on 1080p resulting in bigger and more easily readable text for my purposes. Although the screen didn't appear as sharp on the lower resolution, the text seemed OK and there didn't seem to be any limitations to viewing. So, in general is there much distortion or is it usable for most tasks if one needs the bigger text or should I go for the lower screen size. From the store it seemed like it would satisfy me, but I want to know if there are distortion issues and if text and images are still decent?

Also, due to the glossy screen in a room with windows, is it important to close all the blinds in the day time to reduce glare? What kind of light source is recommended in the room in terms of brightness level? I have two windows with light curtains that allow strong sunlight through.