What's a good upgrade from a Krell 300cd cd player

Well, Having had several SACD Standards, I can say that redbook performance on my 505 is an order of magnitude better than the Standard. Similarly with SACD performance. Same cables, preamp, amp etc. Night and day. They share very few parts. The Physical size difference should also be a clue these are very different machines. Is CAST a 4k retail upgrade? Products that cost 4k more tend to sound very similar to folks who don't have the scratch... I suggest YOU talk to Krell. They tried to talk me out of buying an SACD Standard MK III, knowing I already have a 505. Why do you suppose that is? 'Cause they are the same inside? Please.

I have read several reviews of the 505 where the writers say it is the "best" player they have heard. Can this be done with a new transport and a new clock? C'mon guys. Following this logic the OPs 300 is better than both! Perhaps I should search out some KSAs and ditch my FPBs?

My 505 has two toroidal transformers. A true upgrade for the new drive. Krell did much more than slap a new transport in the mountain of broken Standards piling up at the shop. Eliminating an upgrade path is not typical Krell either. Don't get me wrong, I miss my Standard and will acquire one, completing my KAV stack. For critical listening, I will fire up my EVO. If they sound the same, I'll GIVE you whichever one you want. How's that.

I recently had the opportunity to listen to the Evolution 505 in an all Krell Evolution System, and it is a beautiful sounding (and looking) Machine. Zieman is right "it is in a different league than the Standard" (which I have owned).

I also agree with the others that in a non-cast system the 505’s prowess might be slightly diminished when directly compared to the very best one-box Players availabe – but in regards to this thread - for the money a used SACD Standard (preferably a MKIII) is a great deal and as good as is reasonably needed for most non-cast reference systems.

Jimmy, I have tried all the cast cables one can try. Cast can be outperformed. I've done it. It may seem crazy to invest more on cables than the machine (Tara Zero) but the improvement is once again an order of magnitude better.