Welcome to the site.
We have many knowledgeable members here that are more than willing to help.
This topic has arisen many times before.
Perhaps you could make a more specific inquiry ?
Perhaps going to the Site FAQ link, near the bottom are the K1200LT specific FAQ link, the Hall of Wisdom Link.
The Search link will provide a wealth of information.
As far as your question,
The bike is GREAT, its not perfect, but obviously WE love it.
Its the most comfortable tourer around, and it can make you think its a sport bike at times.
Its not super fast, or super tourqey, but does the job well.
It is heavy at parking lot speeds, but just a few mph will melt the weight away to peg scraping fun !!
It comes with many ammenities that most others don't even offer.
If you can, test ride one, even a newer one will give you a good idea.
The 2005-2006 have a slightly different rake, more hp, and a narrower seat. The newer ones tend to be slightly better maneuvering at low speeds and a tad quicker, but many prefer the older seat.
2008 BMW R1200RT 7200 miles
2005 BMW R1200GS 13000 miles (Sold)
2002 Yamaha FZ1 (Sold) 11000 miles
2002 BMW K1200LTC 29900 miles (Sold)
2002 Yamaha VSTAR-650 Silverado (Sold) 9100 miles