400W 10,000K Ushio or Aqualine AB on Standard PFO MH Ballast

I am running 400w 10,000K Ushios' and it's time to replace them. I've
been considering the 10,000K AB bulbs. Has anyone experienced the
difference between these two bulbs? My ballast is a standard Dual
400watt PFO.

Also, would this type of ballast have problems firing the AB bulbs? I
happen to come across the below insert on PFO's website:

"PS - Similar to standard US ballast, but it has an ignitor. The
ignitor aids in starting AB lamps"
(http://www.pfolighting.com/new%20pfoAq/AQFrames.htm)

The only place I could find AB bulbs at a decent price was at:
http://store.yahoo.com/lamps-now/4010aqabcom.html. Does anyone have
anything better?

Thanks,
SpongeBob