Chip,
What is the rest of your system like? Several of us run without a pre-amp as we use a $300 Squeeze Box for internet audio streaming, digital volume control, remote, and DAC connected to your PC that holds all my ripped CDs (one losslessly compressed CD takes 400K of space). So all I need is power amplification.
I've heard the modded Jolida 1301 with 92 dB/w/m speakers and was very disappointed. I've owned NAD (15 years ago) and while the sound was good and the power substantial compared to its rating, build quality was quite average. I currently own Rotel and would characterize it as NAD sound quality, but well built, a work horse not an audiophile throughbred.
Some speakers are "friendlier" to tube amps and some sources need a touch of tubes. BTW I've never owned tubes. If your speakers are efficient, or your room small and you don't listen at high volume there are several variations of the Sonic Impact digital amp (and other similar DIY variants) available ($40 - 1000 USD). Decware builds a one source 2 wpc integrated (Model C) for around $500.
At this price range the best you can do new is a peak into audiophile grade stuff if you need more than 10 wpc. Used or DIY would be your best hope.