It is a personal choice and the best answer is, 'it depends'. If you are looking at photos sized for the web then expect the higher resolution to reliably offer smaller pictures and thus have a lesser impact. for example a photo that is 750 pixels tall will be over 15% shorter. Also, fonts will be smaller which may or may not be important for you.
I was first drawn to the previous 15" model because the pixels and screen resolution hit a sweet spot for me in terms of image size and ability to read. The 17" MBP physically hurts my eyes and my 27" imac requires me to constantly do some sizing to read which is my only real complaint. The pixel density of the 24" imac (1900 x 1200) is perfect for me as is the regular 15" MBP - and I still need glasses to read. Personally, I wouldn't consider the higher res 15" but would have wanted the anti-glare. I will be getting a 13" MP to compliment my 27" iMac
If you have younger eyes and don't have problems focusing close then the higher resolution models are likely a better choice. When the resolution is too small, as it can be for me, you don't have to ask for opinions, you just know that more pixels is not better. If you think that you may want a tighter pixel density then you probably can take it - but remember fixed size web images will be smaller. My large 27" iMac monitor akes everything I see and read smaller than my previous 21" (1650 x 1050) monitor which never strained my eyes