One of the top contenders to hit the 10,000 supporters for LEGO to consider a LEGO Ideas projects is this one by Psyence-. LEGO Star Wars is a huge property right now and the UCS models are generally pretty well received.
Psyence- reports this Star Wars X34 Landspeeder as 22.5 inches long, 15.5 inches wide and 14.5 inches high including the stand, which puts it into size bigger than the Slave 1 model or the Imperial Star Destroyer. It also uses 2798 pieces including the stand. I know a lot of people would love to build a model this size, I would, but it might be a big much for some people.
Remember to pop over to the ideas.lego.com site once in a while to support some of the awesome models being proposed over there.