Adventures in Homebrewing carries a line of 9 and 15 gallon stainless kettles.
All are available at a pre-order discount price right now. Act soon, to get in on the pre-order pricing as kettles are supposed to arrive and ship soon.
The ports on these kettles are 1/2" NPT full coupling and welded into place. There's no drilling a hole yourself and no messing with weldless kits. The one port version would allow you to add a ball valve and a kettle diverter or screen. The two port version would allow you to install a thermometer and a ball valve and kettle diverter or screen.
9 Gallon Stainless Kettle, Non-Ported -
9 Gallon Stainless Kettle 1 Port -
9 Gallon Stainless Kettle 2 Ports -
15 Gallon Stainless Kettle, Non-Ported -
15 Gallon Stainless Kettle 1 Port -
15 Gallon Stainless Kettle 2 Port -
In my opinion... these are a great deal.
More Beer's 9 Gallon Kettle - available now and a great deal at $89 shipped
Related: Adventures in Homebrewing, All Grain, Mash Tun, Kettles, Great Deals