Agree with Alx, once the tips are scrubbed and polished they look great. If you want "that" sound then it's the only way, at £400 it's worth a punt as that's quite cheap, if no good then put them back on EBay.
Other option is CLS55 boxes but these are hard to find.
Another option is to get some new back boxes fabricated and fitted, you'd need a decent place to do it and comes with a risk of not knowing what it would sound like. But at least you'd have a unique sound and price wise wouldn't be dissimilar to going the C63 box route.
Other option is CLS55 boxes but these are hard to find.
Another option is to get some new back boxes fabricated and fitted, you'd need a decent place to do it and comes with a risk of not knowing what it would sound like. But at least you'd have a unique sound and price wise wouldn't be dissimilar to going the C63 box route.