As far as the smoking hot goes, I think a major reason people get the tongue bite/burn is because they're puffing too frequently to keep the bowl lit. The best way to curb this problem is to remember to occassionally tamp the ash down lightly. Just let the weight of the tamper press the ash down gently. Doing this periodically, about every 3-5 minutes or so, keeps the ember closer to the unburnt tobacco and helps the bowl stay lit longer. The answer could also be, as stated before, a different blend of tobacco. Some burn hotter than others. It's good to give each style a try. Get a quality aromatic from Peterson or Mac Baren, a quality English like one from Dunhill, and a quality Perique blend from either McClelland or GL Pease.
As far as churchwardens go I only have a cheap basket one that I picked up when I first started smoking. I hear Peterson and Savinelli have churchwarden models that smoke really well and I can attest to those being reliable good pipe companies as I have a few different shapes from both and they smoke wonderfully. Although I'm not sure just switching to a churchwarden would help a whole lot in achieving a cooler smoke. That will come more with experience than anything else. My only suggestion as far as a pipe goes for a cooler smoke would maybe be to try a filtered pipe. Savinelli makes filitered pipes that smoke wonderfully. I have two of them myself and love them both.
I hope you find the answer to the current dilemma of smoking hot. It's a very relaxing enjoyable hobby, especially when you find what works best for you and the smokes get cool and you can lose yourself in the flavors of the tobacco.
As far as churchwardens go I only have a cheap basket one that I picked up when I first started smoking. I hear Peterson and Savinelli have churchwarden models that smoke really well and I can attest to those being reliable good pipe companies as I have a few different shapes from both and they smoke wonderfully. Although I'm not sure just switching to a churchwarden would help a whole lot in achieving a cooler smoke. That will come more with experience than anything else. My only suggestion as far as a pipe goes for a cooler smoke would maybe be to try a filtered pipe. Savinelli makes filitered pipes that smoke wonderfully. I have two of them myself and love them both.
I hope you find the answer to the current dilemma of smoking hot. It's a very relaxing enjoyable hobby, especially when you find what works best for you and the smokes get cool and you can lose yourself in the flavors of the tobacco.