You'll get the highest PAR out of your bulbs by running SE on an HQI ballast. The only reason that I'd ever go with DE is to save space. But if you have the room, then make the most out of it!
As far as the bulbs, I believe that you'll be very happy with the Reeflux over the Phoenix. The Reeflux 14k has a great blue color to it and they last 10-12mos vs. only 6mos with the Phoenix. Also, Rod sells the Reeflux bulbs for an excellent price.