I am preparing to build an Aleph J for my first amp. I have most of the parts on order with the exception of the capacitors. I have found plenty of info to support Nelson's choice of the Elna Silmics II as a wonderful sounding electrolytic cap. The cap i have a question about is the Input Cap C1. I have a frien who is helping me with the build who says that if there was one to upgrade, it would be this one. But, he also says that Nelson's stuff doesn't really need expensive caps to sound really good. I tend to agree but would like to hear opinions. Why pay more for a boutique cap and will it really sound different.