change amps or speakers


I am powering Eminent technology LFT8bs with quicksilver M60 monoblocks.  No preamp - I am running a dac directly to the amps, which works because with this configuration I am using very little attenuation.  Problem is it is obvious that the ETs require more current and/or wattage- the detail is there but not the punch and there are times when I am maxed out on volume at 12 0'clock and need more. Question is do I change the amps or speakers - I love the quicksilvers and put some serious $ into modifications.  A well respected friend/tech highly suggested I seek out a used pair of PSB stratus golds. I have a medium sized family room and like detail neutrality but need more rhythm and dynamics. Thanks you.
majorc
@ditusa
Your super cool el34 quad-output-tube Silver 60 amps (with larger V4 amp transformers) are close to 2x the drive compared to the older and smaller dual-output-tube EL34 monos.

Now your amps would definitely drive @majorc ’s LFT8b speakers. I’ve actually heard that combo together before at a local dealer. Was there to buy those amps on trade-in, and they sold too fast. Very nice. Lucky You :)
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@majorc
I could be wrong but I think that pre-amp (sonic frontiers anthem pre1P) is a phono stage pre-amp but I think you need a line stage pre-amp which is why it didnt sound right...
Thank you.  Looks like I will need an active preamp no matter what avenue I decide to take so I will try that.  Any suggestions?  I can start with the quicksilver line stage - others I see on the gon that are highly touted is Don Sachs and Backert. I wish I didn't put so much money into modding my quicksilvers - if I didn't I would just sell them and replace with the newer model.  
@ majorc
  I would go with the quicksilver line stage it has 18 dB of gain to drive your amps to a full 60 watt output. I use a schiit freya+ preamp to drive my amps. good luck. :-)