Welcome to the site !!
I have a 06 and love it , although I did not Dual Sport it , I ride it a lot off road , and the only issue with the older gen bikes is the Titanium Intake valves from dirt getting past the air filter , switch to Stainless , and never look back , mine has gone since 2006 without the need for a valve adjustment ... , only other mods were changing gearing for trail riding (13/52) and going with Tubliss (no flats) , and doing the "Pink Wire Mod" (changes the mapping and timing slightly for more punch) , done the larger AP cover , and revalved (myself) the suspension and added a Kouba link ( I have short legs and bad hips *I am 61 and have a lot of injuries ** , so it makes it easier getting on/off) ..... it is great for Single Track , and open desert , and I have even run a few laps on the MX track with it , and of road style GP tracks and it does just fine ....
The new gen X (newest) I have not ridden yet , so I can't give a comparison , as I do not know anyone who has one , most of my friends ride MX bikes and usually EFI MX bikes , which is what I mainly ride myself (2020 450R) as I mainly ride MX , some of them also ride older or newer 2 strokes (last gen CR250's ,YZ250's , KX 250's , etc.)
But as far as the old gen (05-17 (they did not make a X for 18 , just sold rebranded 17's) , they are the staple of a Honda off road , easily dual sported bike , and is the #1 choice for Baja .... I won't be getting rid of my X anytime soon ..
Hope that helps some ...
