I didn't go looking for one with speakers! But it was a definite selling point when she thought she was going back into a "babyseat".
I am aware of the up to 7/8 thing which is why I was delighted when I saw this one (although not by the price obviously ) and in one review it does say it's a weight restriction rather than an age one, so we'll have to see how she grows but might see her past 10. Our other two (aged 10 & 9 when we came out last year) were still in their hi-liners, but we didn't bring them because of the laws and haven't replaced them because of the age thing on all of the ones I've seen here (in the RAA shop where we'd get 5% discount for being members they have very similar models but like I said they only recommend up to 8 so I haven't chanced it).
I'm hoping to get the money back on Mix FM's Write your own cheque competition in the next few weeks