I'm not so sure chaps.
At £500, I'd expect something that delivers more than 20wpc, so yes it'll do alright, but frankly, in 2012 the amp section is wanting - there's no excuse for delivering with such low power unless it's for the kitchen or a second system in a bedroom. No DLNA either, which means there's no wireless streaming from the laptop. For £500, you can do better. And this from someone who's glad to see the Sansui brand back on the shelves. Two years ago, this would've been worth it but not today.
To the OP: I find the Onkyo's DLNA and general connectivity pretty much flawless. No CD player granted, but at £250 for the 8050 (shop around) it gives you everything but, all you need then are some speakers and your CD player. You can plug your portable digital player into the USB on the front, or an external HDD if you have one and the Onkyo's excellent DAC takes care of the rest.
You'd definitely do it for your maximum budget, and might for £600. On the other hand, if you don't want to turn the wick up, the Sansui might tick all the right boxes. Try and push it hard though and it'll sound strained.