Thank you both for your responces and for the kind welcome to the forum!
In answer to your questions, i run a landscape garden maintenance business. I currently have an ifor williams trailer that i tow about day in day out. In my mind im hankering after a 110 for its better towing characteristics and load space within the vehicle. I currently have my discovery rear seats folded down to accomodate equipment i dont wish to have in my trailer (security reasons mainly) and so im thinking that the loading space im used to is closer in terms to the 110 than the 90.
I have read up and have heard there are a few concerns as mentioned above regarding the head, coolant leaks and cracking and for a relative newcomer to the LR fraternity concerns me somewhat.
Logic might not always prevail, but im thinking that a more modern defender, with some techinical revisions would make a safer and more reliable purchase.