@qb looks like you got some solid advice from a fellow camper here!  I remember the Taj well and am disappointed that you are having trouble finding an equivalent.  My first thought was the Marmot Limelight, but i see that you already have that tent. 

My advice would be to look at some of the companies that really experiment with tent shapes and therefore may give you the little extra space you are looking for.  You might find a win with Nemo (galaxi), Big Agnes, or Kelty (gunnison).  I also spotted the Marmot Thor, which might be more tent than you're looking for but worth mentioning.  Also, if you just want to see a cool, spacious tent, look up the North Face Golden Gate.  I stumbled upon that and may need it for myself now!

Hope any of this helps and you keep enjoying your time outdoors!

At REI, we believe time outside is fundamental to a life well lived.