My business name as a square 'logo'

I'm changing my accounting software and the invoice template really only allows for a square shaped logo.

I would like a purely typographic logotype, featuring just my business name -- CSM Communications. The CSM is the most important bit, so I realise that the 'Communications' is likely to be very small!

I don't need any decorative twiddles. The tone I want is clean, classy and professional -- I provide writing, editing, and comms services to universities and research institutions, so don't want to frighten them by looking too funky, but neither do I want to look old-fashioned and fuddy duddy. My personal favourite typefaces are Swift, Gill Sans, and Garamond.

I would like the logo as a jpeg, so that I can upload it easily to use on templates etc. An eps version would be helpful, although I wouldn't use it myself.

I will need a version in black and white, but if you would like to include a colour, I'm fond of teal.

Ideally I would see three draft designs from which I could pick one to be finalised. Please feel free to ask questions before submitting your bid.