I've run mine a LOT for the last year, and haven't had a bit of problems. I keep the battery cable taped so it can't come loose... that's my only fear. I ran mine stock for a while before I shipped it off to Busman. It sounds fine stock. If I were buying a new one now, I might think about getting the R44, but I have no reason to dump this R4... it's a workhorse.
I just looked up the exchange rate... it looks like $799CA is something like $550US and that is a good price for new. I've seen a few used for $500, but that's a good price.
What have you got for big mics Dennis?