Preamp - 18 dB Gain too low?

Being a newbie to audio stuff, I'd like to hear your opinion whether should I replace my preamp. To get to a reasonable loud volume, my preamp has to be at around 1PM to 2PM position for most of CD and music DVD. Should I get another preamp with higher gain? If so how much more? Why don't the manufacturers make higher gain? Probably some sonic compromise with high gain active preamp?

Any suggestions are welcomed.

Preamp: Conrad Johnson PV-10AL, gain 18 dB.
Amp: Shuguang S845MK (tube amp 848)
Speakers: Tekton Lore (Sensitivity 98 dB)
Room: 25 x 17 x 8'