I think whether or not you need radiant heat in the flooring depends on the type of flooring you have. We have geothermal and we have wood floors throughout with Marmoleum in the laundry room and bathrooms and we do not find the floors to be cold. I would probably feel differently if we had tile floors.

We have geothermal and radiant floor heat. We have wood floors in all areas except the bathrooms where there is tile (some stone, some ceramic?). When the ambient temp in the house is comfortable, the wood floors are just slightly warm feeling; the tile floors more so.

The majority of our house is going to be wood, but we will have some tile. I already have the materials to put it in for the bathrooms, but just trying to decide whether it's worth the extra couple thousand to just go ahead and do the entire house. What would any of you suggest?

A couple thousand sounds like the radiant floor tubing and labor only. Have you factored in the extra mechanical equipment? Geothermal cooling (forced-air) uses different compressor technology than geo radiant heating.

The only additional cost would be the tubing, transfer plates and manifold. I will be doing the labor. We already have a dual mode system, as our basement floor is radiant, but the rest of the house is forced air. Sorry if there was confusion there.

Oh neat! What brand has that option?

I lied... Looks like there are two separate systems. All the equipment they are installing is Bosch. One air handler and one water to water. The only part of the heating and cooling that I am "qualified" to do is the monkey work of running pex. The rest has been left to the professionals. I already had plans for the radiant in the basement, so adding it upstairs wouldn't be a huge expense.