I am in the extra long extra wide camp, or at least one size up from what the chart says if your a smaller sized person. I sleep on my side and front and like the quilt to come up over my head and wide enough I can move around and not worry about drafts.
I like to move and even with the extra size the quilt is lighter than an equivalent sized bag would weigh and much more comfortable for me.
I have number of quilts, most homemade some synthetic, some down. now a EE enigma. I like the down best, but before I put down 3-4 hundred on a nice down quilt, I would try a synthetic on a trip or two so you know the sizing works for you. Its possible to make a synthetic quilt in 1-2 hours for well under a hundred bucks.