Hi I've been thinking for a long time and I don't know what to do.  I have a $ 5,000 Roland SP-540i on offer, the guy who worked on it didn't use it much and the heads are fine.  and I have a Roland VP-540 for $ 3000 which has ok heads, I don't know how old the machine is.  What are your experiences, I don't have much work to do now that I need a fast machine.  What can you recommend me