Cool Kent. I found Arista Premium 400 to be very similar to trix in speed and grain qualities. In my own testing, I found it to be slightly contrastier than trix. Wet prints, scans and inkjet prints all seem to have about a quarter of a grade more contrast than trix for the same development time.
As pointed out by Marke above, be sure to order the Arista Premium 400, as there are several 400 speed Arista films.