SS preamp with tube amp

Kenny,
I’ve used tube preamplifiers exclusively for the past 20 years and actually agree with what atmosphere wrote regarding superior low level information retrieval. Only in the context of the OP’s question concerning "tube character" I happen to believe that the power amplifier offers the greater degree of this character.

I use 300b mono blocks as you do and I am certain you’d love a high quality tube preamplifier. My SET amplifier sounds wonderful with the Coincident Statement Line Stage and the Atma-Sphere MP-1 preamplifier. Also excellent with the VAC Signature preamplifier. Kenny I think your bass issues could be partially explained due to the placement of your Hornings. 
Charles

Charles,
Good points. I don't want to hijack Greg's post, but I thought that the addition of open baffle subs, that want to be away from walls, would give me the low level detail. I'll have to see, because things are slowly improving as the subs are breaking in.
Kenny

@greginnh what do you feel you're missing from your Esoteric? Did a quick google search and that looks like a pretty special integrated. I'm a tube guy all the way but have a certain fondness for Japanese SS from companies like Esoteric and Accuphase. I would think you would have to spend quite a lot to better the performance you are getting now. Also as others have said perhaps not the most tube friendly speakers. Perhaps new speakers are the answer rather than new amplification? Just a thought.

the thing about the power amp is that it must interface with and control the speaker, besides delivering adequate current, etc. so it never clips

other than that I think atmasphere put it well

for the record, I have a tube pre-amp - the ARC LS25 MkII (which replaces a Sonic Frontiers Line One I've had for ~20 years) and my Sunfire amp is SS which I may replace for another SS most likely - have had it for ~20 years and before that an Adcom

they drive Maggies (for the last 20 years; before that Vandies)

I am highly likely to upgrade the speakers and source material before changing the electronics...

For the record, I am very happy with my integrated amp. I was just curious if the SS preamp made sense as I had an opportunity to scoop up a MC275 for a great price.  It's just an OCD thing with me, I can't leave well enough alone!  

My second rig is a Primaluna DiaLogue premium paired with Audio Physic Tempo Special Edition speakers so I will have to "settle" for that sound in my living room!  

Thanks for all the great advice!