Hi Lynn,
I did this tour last February and we also had the eight hour stopover at KL. It is an amazing holiday despite the fact it took me 36 hours to get home (back to Ireland)! The stopover at KL wasn't too bad - myself and two others booked into the Plaza lounge which is upstairs (along with the other lounges). The difference with it is that anyone can book in (with some of the others you have to be a frequent flyer or upgraded to business class etc). I think it was about $20 or so and for that we got three hours access, free food and drinks, very comfy seats, wi-fi, tv etc and it was very enjoyable and well worth it. If you have a Kindle bring it too, to pass the time!
Hope this helps and that you have a wonderful holiday. If you're interested, you could look at my review which is currently on page three of the Reviews forum.
All the best,
Bob