Options to replace Supratek Chennin Pre


Looking for suggestions for a replacement pre for my Supratek Chennin Preamp. I absolutely love most everything about this pre except in my system it is slightly lean. I would like to stay with tubes unless the nature of tube pres is to be a little lean. HT pass thru is a requirement. The Supratek has a HT pass thru and I love how simple it is to backdoor HT through the hi fi. Price range will be about $3,500.00 new or used. I want something that will retain or exceed the holographic, open, precise sound stage that the Supra offers but with more slam and extension in the bass. I recently pulled the pre out of the system and ran direct from the wadia 861 and bass slam was improved to an exceptable degree but obviously lost all benefits of tubes.
System:
Wadia 861
Supratek
Parasound JC 1s
Vandy 3A sig
2WQ subs
Audioquest Cheetah, Cardas Golden Cross intercon
Alphacore MI2 spk cable bi wired
braro
Running all stock tubes except the RCAs of course. Ok stupid question.... the rectifier tube is the one in the power supply right? I will try replacing the rectifier and Sovteks. Ikkyu2 are the tubes your referring to NOS?
The Bendix 6106 and 5AR4 rectifier make a substantial change to the Supratek (I prefer the 6106). And NOS regulators make a MUCH bigger difference in my Chardonnay than any NOS 6SN7!
The Van den Hul carbon fibre interconnects will give a richer,fuller,bigger sound without having to change your preamp.
Otherwise a Suptatek Cabernet with TJ 300b meshplate tubes will give you the least lean sound you can probably encounter.
Braro, no the KT-66s were new Sovtek, a matached pair. I think I got them from Brendan at tubeworld.com. Reasonable in cost, I'm recalling $40-ish. A good place to start.
John, I use WE 350B's as regulators. They are expensive, but they are the best. GEC KT-66's are also quite expensive, but are not in the same league as the 350B's.

And to answer your question about my source, I use a Forsell Air Reference Transport and an extremely modified Audio Note DAC 1.2.

Jtgofish is correct. Van den Hul The First Ultimates will definitely give a rich, organic sound. They are a little loose in the bass and can induce a little hum. If the bass was tighter and the IC's were hum-free, they would be my interconnects of choice. In your system they may be just what the doctor ordered.