Nope, not too big at all. In fact you will only barely start to notice the improvement with 1080. To get the full benefit, assuming 20/20, you need to have about an 80" TV from 11'.
THX recommends slightly over 98" from 11'.
IOW, 58" is not too big, unless perhaps standard def is your thing. I forgot the last time I watched SD, I think it was '07.