Toilet rough in disadvantages

[Bryan N.]

So, after putting ceramic tile in I went to reinstall the toilet.  Of course, I dropped it and it broke.  I measured the rough in at 14" and went to Lowes.   They said all they had is 12" and would have to order 14".  So, I went to Home Depot.  They said I could install a 12", but the tank would be a couple of inches from the wall which could cause the bolts to break the tank when someone leans back on it.  The local plumbing supply told me something similar.  

So, I paid the sucker fee of an extra $50 from the local plumbing supply for the in stock 14".  I decided not to install tonight.  I may return it in the am and go buy the 12" for $50 less from Lowes or home depot. 

I'm curious how everyone has approached this.  12" because it's cheaper and works? Any disadvantages?  Or, get the 14"?