2K is pretty big, and usually reserved for lightmaps etc only (to get somekind of resolution out from a hi-poly environment / level {lot's of polys all needing unique UV space on the map}).
1K is the usual starter resolution for me and having few (2-3) + required mask / normalmaps at that resolution per model is not a biggie for me. And if you look textures from any Triple-A game published recently (meaning that the tech / gfx is 1-2 years old already) you'll see that they agree.
DXTC would of course help 4X but Blitz3D is not going to get them.
1K is the usual starter resolution for me and having few (2-3) + required mask / normalmaps at that resolution per model is not a biggie for me. And if you look textures from any Triple-A game published recently (meaning that the tech / gfx is 1-2 years old already) you'll see that they agree.
DXTC would of course help 4X but Blitz3D is not going to get them.