</font><font color="blue" class="small">( Just my opinion, but I would go with one that covered my tracks. )</font> <font color="blue"> </font>
With this statement , It makes me ask is a 1533 & a 1433 the same width ? Because my 1433 is right at 60" outside to outside of the tires or very close... which would cover my tracks with a 5' hog...
To be honest when I hog I have used my 135 with 38hp and when cutting stuff as high as the hood there is enough power to run right through anything in its path with my 5' hog , I haven't as of yet tried my 1433 with the hog...
The 135 is wider than the 1433 by about 10" or so and It hasn't made any real difference with it not covering the full width of the tracks even when I was just doing an open field(thats just me though), But I see your point about covering the full width of the tractor...
I guess the main concern is really about the full use of the hog, If at any time in your future you can see the possibility of cutting heavy brush or saplings I would IMO go with the 5' , but if you know you only be cutting an open field with no real heavy brush I would think a 6' hog would work as well ... That is your decision .