QUOTE(Musical Maniac @ Aug 16 2009, 12:02 PM)

I'm not a clarinet specialist by a long stretch, but really if he sounds okay, the normal student clarinet will be okay until grade 8.
I suppose if he's making a good sound now then if he moved onto a little more (how to say it..) 'advanced' clarinet he might sound even better?
But there isn't really any need for him to change yet if you both feel happy.
MM
MM's mum here!!! I dare say she's right, but she's had two upgrades herself, and has only recently passed Grade 6! All of her clarinets have been second hand and she began with a B12 which almost paid for itself as it was bought on ebay and then traded in when we bought clarinet no 3. We still have clarinet no 2 as a spare, but I feel reasonably sure that we would get most of what we paid for that back too, if we ever needed to sell it. As BM said, clarinets are relatively cheap so financially you may have little to lose by upgrading.
In our case, we had no particular need to upgrade I think, and nobody told us to do it. It was just a question of nice, and somewhat better, instruments coming up at good prices each time, so we took the opportunity. That said, MM does really enjoy her current clari (which I trust will last many many years!) and would be very reluctant to revert to either of its predecessors.