The majority of the guys I ride with are KTM owners. I know many people who own or have owned the 300 EXC. Every one of of those riders would tell you that the 300 EXC is one of the best trail bikes of all time. They have tons of low, mid, and top end. I have ridden a 300 EXC a few times and was impressed. I have considered buying one, but it seems clean low hour KTMs are expensive if you can find them. This is based off of my personal experiences when shopping for bikes. For the record, I am not a KTM owner. Personally, I wouldnt spend the sort of money you described on a 8 year old RM. I also wouldnt spend $8K on a new 300 EXC...but if you have the bank roll to spend $8K, you wont regret the purchase.