iMac 27 Retina or Mini with 34" Curved?

Hi all,

I've been working for years with a MacBook Pro 15 primarily used as a desktop with two 24 inch monitors flanking the sides. I've decided to make the MacBook my dedicated portable and build a true desktop environment. I have already purchased an iMac 27 Retina which should be delivered today, but last night discovered that another option would be a Mac Mini with a 34 inch curved external monitor. I would really like some advice and opinions as to which might be the better choice.

I can add details regarding my work/play needs as you wish. Probably of core interest is that I am not a graphics professional. I use my desktop environment for running a wholesale/retail business and for casual Internet use. Most of the time I have 4 or more spreadsheets open, a many tabbed browser, a few PDF or image files, couple of Finder windows, a Word doc or two, etc. I do use Photoshop and Illustrator for things like product photo adjustment and resizing, logo creation and edits, etc. Mostly it's day to day business operations stuff.

Thoughts?

Thanks.