Ya the Optura 10/20 is probably one of the best 1 chippers out there... and you could probably pick one off ebay for around $200 if your lucky... I haven't really been following the lower end Panny 3 chippers but I have seen decent things out of them...
check out this thread from the skateperception forums
http://forums.skateperception.com/index.php?showtopic=55103