Suggestions for a tube pre and power amp

@porchlight1 To be honest I am looking for 3D holographic sound and high level of clarity. I am not very good in describing my preferred sound. 

Luxman 590Mk2 is Class A 30W @8ohms and then it switch to class AB. I never felt power is less but with bad recording I may prefer a little warm presentation. I can try what you suggested, Luxman can be used as a preamp alone as well as a power amp with separates switch. 

Other question I have is it really needed to go with balanced output or single ended connection is good enough? 

Thank you.

@kevemaher Agreed, A closer look at the measurements indicates the 328BE is  actually a difficult load on the amplifier, dropping down to under 3 ohms in the bass region due to high phase angle and low impedance. 

@agbrace Your both speakers need lot of power I assume. You have very good power amps. I understand the importance of synergy between amp and speakers. I like luxman build quality and I dont want to go sidewise after the upgrade to pre power from Luxman.

Since you are familiar with F228Be I think F328Be must be a step up over it. Revel F328Be is really good speaker (well measured) but again synergy between amp and speaker plays a big role. Beryllium tweeters are very transparent and if recordings are bad it will show immediately and with good recording it sounds very good with Revel and Luxman combo. I have top of line AVR from Arcam (class G) and when I use (You tube/blue rays) it with Revel all bad recordings sound good but when paired with  Luxman Revel highlights the issue very quickly.

@vthokie83  Thanks for sharing your experience with S5.5 and Motherlode XL preamp. I was also thinking S5.5 will be more than enough for my speakers based on my experience with Luxman 590 30W class A integrated. However some members expressed concerns due to low impedance and phase angle and Luxman's power spec is underrated.

I will talk to Doug Dale at Coda an decide. Last week I was very busy with work hence couldn't talk, I  will do it coming week.

+1 for Aric Audio, had a Super 6SN7 awhile back, very nice and beautiful build quality.