Fitting what I'd consider a good set into 1200$ at 55" is gonna be tough if you can't go Plasma.
There is the ST30 Plasma that fits in the range. It has 3D, but the S30 doesn't come in 55". The upside is that it is actually considered one of the better budget units on the market as of today.
There are a few budget model 55" LCD/LED sets in the range you are looking at, but the ones to probably pay the most attention to are the 55LK520 from LG, KDL55BX520 from Sony, and the UN55D600 from Samsung. I'm not too familiar of Toshiba's reputation lately since they only seem to produce budget units these days, or Philips.
Sony 55HX929, Marantz 5010, Polk LSiM 703/704.