What tube preamp is a step up from Rogue Magnum 99

Hi,

I wanted to try a tube preamp as I think my system sounds a little bit lean.

My local dealer let me take a Rogue Magnum 99 for an in home test.

In my system, the Rogue was an improvement because there was higher resolution and a more live presence (probably a lower noise floor with the separate power supply?) and better bass.

However, I am wondering what other preamps excel in providing a great "live" presence and bass.

I have read about the Cary SLP 98 and the BAT VK 51SE but I do not have access to try these out at home. The reviews seem to single these out as being a little bit warmer than, say, ARC equipment, and they are supposed to do bass well.

While I could purchase the Rogue now I want to avoid the upgrade in the future. I would rather spend more now and definitely move up.

I would appreciate any learned comments to help me out with this decision.

My system is:
Ric Schultz modified Oppo 105,
W4S STP SE Preamp
W4S ST1000 Amplifier
Cullen Cables
Maggie 3.6 Speakers

Thanks!