I can virtually guarantee that you will not find a slot-loading CD-burner due to alignment issues. It's one thing to put a disc on a tray and let the mechanism load it. It's another thing entirely...

Try this (http://www.google.com/search?q=cd-rom+%22slot+loading%22&hl=en&lr=&ie=UTF-8&oe=UTF-8&start=10&sa=N) search, for starters.

A DVD-burner is backwards-compatible with the earlier formats, but watch out as there is more than one DVD-writable standard. What you want is a drive that is both DVD+R/RW and DVD-R/RW compatible...