Here is the modern version of the boiler that I have:

http://www.triangletube.com/TriangleTubeProduct.aspx?CatID=1&PID=19

It's done very well for me, but the controls on mine are older and simpler low voltage stuff. The new ones are microprocessor. I have yet to have to replace anything in mine, BUT it has locked out a couple times for odd reasons. The way that TT explained the last one was that the unit is sensitive to induced currents in some of the circuits. They are particular about how the igniter wires etc are routed and that they don't come in contact with metal etc. The new microprocessor should take care of that.