SO glad you posted this Jersey! I had the same impression you just gave.... at first.... that Geo systems are pretty simple, especially the pond loops. I'll admit the more I read here, the more confused I get. I'm not really worried about all the technical stuff-my husband is an engineer and I suppose he'll figure it all out in due time if needed. I sure don't want to spend this much money and have all these problems! I'm sure like everything else there will be a few minor problems. We will probably go with WaterFurnace also, mainly because you use it and don't seem to have many problems (and also that we are in the same zone). I wondered too if there were any 'bargains', but I see they are all going to be basically the same. I'm content with the fact that we are able to use the pond and will save a bundle there. We are going to put off building the cabin a while until the economy picks up a bit, in case we need to help the kids out. The pond is still on, soon as they can get out here. I've learned SO much here and sure I'll be around when we start this pond. I get more excited every day about the Geothermal, which we have pretty much decided we are doing. Jersey-at what point do we need to contact the company? I was wondering since we will have a basement, should we have tubes or anything else under the slab?? I'm wanting to leave the concrete and stain it, using throw rugs. I know it will be cold down there. The main floor will be all wood floors.