Which Component Needs to be Upgraded First


I need your help. I am looking to upgrade a component in my system. My question is which of the components is the weakest link and should be the first to upgrade. source: Sony 333es SACD, Pre-Amp hand built by Veda Audio - Dyna Hi Kevin Gilmore design, B&K ST 140 amp, Talon Audio Khorous-X speakers (the speakers are not going to be considered for upgrading. Thanks for your wisdom.
gunting
Hey guys,my question is sort of on topic.Anyone had any experience with isolation transformers and their application at the source (CD/DAC)Comments,opinions?
I have used several BPT power conditioners on my digital front end only with good results. Deeper bass, took out some of what we call digital glare or hardness, smooth highs and improved stage size.

I now use a battery powered CD player so I sold my BPT.
Tvad, I have been reading the site info as well as posts on this unit and I am going to buy one for my house.

Two questions

Has it improved your sound in any way?

Seems this unit will clean ac and surge protect everything electronic in the home. My bedroom TV etc...........

Bill
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