How would you introduce tubes into this SS system?


I have a Rotel RC-1070 preamp and a Parasound HCA-1000 amp driving a pair of NHT Super Two’s. The Super Two’s sensitivity is 87 db (2.83V at 1M), 8 Ohms nominal impedance (3.8 Ohms minimum), and recommended amp power of 25W/ch min. and 175W/ch. max. The Rotel’s output level and impedance are 1V and 100 Ohms, and the Parasound’s input impedance is 33 kiloOhms. The budget is around $2000 for either a tube preamp, tube amp, or integrated tube/hybrid amp. I like the sonic qualities of tube equipment, but I don’t want to sacrifice too much bass. I should also mention that I use this system primarily for listening to vinyl on a Music Hall mmf-5.1 turntable. Should I replace the Rotel, the Parasound, or both? Thanks for your opinions.
jackalope
I made an offer on the speakers, and he's going to ship them! The amp seems great, but now I'm a little gun-shy about the lack of tech support and parts. You all have been extremely helpful so far (except secretguy, but that seems to be his M.O.), so thank you for your help! 
In your search for an alternative integrated amp don't overlook the Primaluna Dialogue series. The older Dialogue 2's are easily in your price range. The newer ones are probably obtainable for something in the mid 20's. I've seen the 2's up for sale for $1600 on the used market which would make them, for me anyway, an attractive choice.  
Well done with the speakers. I hope he's shipping in the original boxes.

According to Stereophile, these speakers are tube friendly. Even though their sensitivity measurements were only 
84.5dB/2.83V/m, impedance only dropped to about 6 ohms in the lower mids and much higher in bass frequencies. So, it's an easy to drive speaker.
You should have no trouble finding a tube amp to pair with the Josephs.



I h as ve been down the same road.  In my opinion you should start eith a tube preamp.  That is the best wsy to introduce tubes inyonyour system.  Will still have the bottom end that we all love.  I recommend a Conrad Johnson PV12. Great smp for a great price.  The newer PV amps are fantastic also just more money
How about a Rogue Audio Sphinx integrated tube + SS?
Fully supported etc, and can be found used.
Have an audiophile friend driving his Maggies with one of these. He's tried more expensive gear but likes the Sphinx better!
http://www.rogueaudio.com/Products_sphinx.htm