Weight Dilemma

I know there is plenty of discussion about this and I have searched throughout the forum and elsewhere to learn as much as possible, but I would like to hear input specific to my situation.

I am planning to install an ARB front bumper and Warn M8000 winch on my 2014 AC 2.7L 4x4 in the near future.

I am divided though on how to upgrade my suspension to support the added weight.

Option 1 would be go with a full OME 886 setup, see below, and go up to a 265/75/16 tire.
http://trdparts4u.toyotaofdallas.com/Scripts/prodView.asp?idproduct=-8414

Option 2 would be to go with toytec front coilovers TTAFCS-6005, see below, maintain stock height and 265/70/16 tire.
http://trdparts4u.toyotaofdallas.com/scripts/prodView.asp?idproduct=-6881

I understand lifts, bigger tires and weight result in power/mpg loss, but I am curious whether which option would result in a lower loss of power or mpg. Or would both options be the same? if not even noticeable? I tend to do a decent amount of highway driving (70-75mph) and I enjoy the mpg/power of the factory setup. Would doing either option result in a drastic change? unbearable to drive on highway? Too much for a 2.7 to handle? Any personal experience or input would be greatly appreciated! Thanks!

 

Here is an article that may help.
http://green.autoblog.com/2009/10/29/greenlings-how-does-weight-affect-a-vehicles-efficiency/