front ported speakers with ribbon tweeters?

The VMPS 30 uses a bottom facing passive radiator that is vented to the front.

Here's an off the beaten path recommendation. Try the Newform Research speakers. Not ported, but sealed. Odd looking, but great midrange and image well. I had the old Module 30's in my system. These needed a sub, but the newer models can do well without one. These are excellent speakers.

Ever consider a custom loudspeaker http://www.kcsloudspeakers.com/