I certainly don't mean to insult--but any good quality tile is going to be cold on your feet... If you like tile, but not the cold, a good solution would be to install radiant heat in the sub-floor of your bathroom when you do the remodel. Radiant heat floors are a desirable upgrade in upscale bathrooms; also consider glass tile as the newest uber trend. Both of these options are fairly expensive, you need to determine their personal value to you as a creature comfort, as well as how much of this investment you are likely to recoup at resale. Do not over-build or upgrade you house far above the standard home in your neighborhood--you can never fully recover the financial costs of having the "nicest house on the block." Best of luck!