I'll go against the grain on this one. Because, recently I got a 73" 3D HDTV, Mitsubishi 2010 model open box/with warranty sale for $1000, and Sony Blu-ray player and have to say 3D presentation is pretty impressive, with Sports being really good in 3D.
Also, got 4 3D glasses DLP link for about $180. The more expensvie glasses are active sutter which requires the purchase of an emitter also. Some of the Mits/Samsung models support DLP lowering the glasses cost.
When watching 3D even in theaters breaks are recommended. I find that a 5-10 minute a couple of times during full length movies eliminates the headache/eyestrain issues. Although it's said a % of the population cannot watch 3D due to these issues.
So, my package was about $1350 total and I would reccomend 3D. Cable companies and movie producers are getting on the bandwagon and the number of offerings is increasing monthly.
Further if your selected 2D HDTV model supports it why not as it allows switches to your desired mode.