Affordable Tubes for Anthem Pre 2L

I replaced my Audio Refinement Pre5 pre-amp by a used Anthem Pre 2L in order to correct a Brightness issue in my system (Vanderstein 2Ce, Odyssey Stratos, Cambridge Audio 540C2, Audio Art cables).
The Anthem Pre 2L came with a set of 4 Jan Philips ECG tubes. It was a considerable improvement on the brightness side but I had now major Microphonics issues. I replaced these tubes by used Amperex Buggle Boy. I got the warm sound I was looking for, the brightness is gone but so are the deep bass!

I'm into jazz, rock that's why I bought large speakers in the first place, So it is a problem for me.

Could any body recommend tubes that would bring back the bass without being to bright.

I'm on a budget, so I would like to stay away from these expensive NOS. Let's say 100$ for a set of 4 would be my upper limit.

Thanks in advance,

Walter