You still have time to get your food geeks gifts for their kitchen. Serious Eats has a great list of gadgets.
I can vouch for sous vide cooking – especially a steak – and then using a torch for searing it after it is perfectly cooked. Fire in the kitchen is cool.
If you want to do it right AND healthy, go get yourself some grass-fed beef, free-range organic chicken or heritage pork from ButcherBox.