Hi guys, thanks for the replies.
I had looked at the differences between the 500 and 505, and couldn't decide if it was worth double the cost for a 505.
I had lookked into the STAReBOOK, but am worried about having to convert all my files first. Had a look in the subforum for the STK-101 but couldn't find anything concrete.
Ebay seems to vary, 500's are quite expensive, £120 delivered from USA with 3 days left! Suppose I'll just have to keep an ye out on ebay.