Advice on center/side/rear speakers with D603 S3s

[Intense]

Hey all,
I'm looking for some advice for my 7.1 HT set-up. I've just gotten my my D603 S3 (used) for my main channels. Given that these are older models, are there any more recent B&W models that would be compatible with my mains?

I know the LCR600 S3 center is normally used with the 603s. But they're, obviously, a little hard to come by, these days.

FWIW, I'm using a SVS PC-12 NSD for my sub

Thanks for your input!
~mike

[stuofsci02]

Do you need a horizontal speaker? Another DM603 S3 would be the best choice if you can fit it.

Cheers,

Stuart