I spent the whole year of 2007 trying out different gear. We took out 25 different speaker cabinets on one tour. Our crew set up a different bass rig each night for Anthony and me. It was awesome. I was also surprised at the advancement of each company over the years. Everything sounded good.
I was totally surprised and blown away by the new Hartke HyDrive cabinets. I choose to endorse this company and have been using them now since the beginning of 2008. I usually use two 4x10 and two 1x15 speaker cabinets.
I'm using two LH 1000 heads for preamps and power. (One stack is really enough but why use one when you can use two?) The sound is amazing and I have tons of headroom. The Hartke gear is also lightweight and inexpensive. You can't beat that!