New tubes for SFL-1 / SFS40

I actually called Kevin at Upscale Audio but he wouldn't sale me any 6dj8/6922 tubes because I didn't buy my amp/pre-amp from him. :( darn it.

Thank you for all your responses.
To clarify, I have SFL-1, not Line 1.

Dekay, do you know where I can purchase EI Elite 6dj8?
I am thinking of trying them out.

Many of you suggested that I change my system. I think you are right but before I do that, I like to try some new tubes. I am purchasing a ZERO Autoformer for my system...I am hoping that will make my system sound more "warmth".

Thanks again.

-Sean

Wow...this is getting interesting.

Dekay & Fpeel, thanks for the link.

Dtails, where can I find more information on caps? DIY? I'll do some research on AA. Thanks alot. This is fun.

I just purchased a Zero Autoformer. My system sounds more dynamic (much better bass) and the high is more focus.
Because of the extended mid-bass, my system sounds more warmth overall.
I just purchased 4 6dj8 Globe Amperex from Ebay.
As soon as I get them installed, I will give you an update.
But the new Zero really helps my system.

My system doesn't sound dry and bright like before.