Difficult to say really, how much extra would you have to pay? you can get a pair of mf mono bloc power amps on ebay for around 300 pounds on e-bay, these have the same power output as your amp (50 watts) and may be a beter choice?
Jim, I am looking at a new set up consisting of Audiolab 8000Q Preamplifier and a couple of 8000M Mono Power Amp A's.
As a round figure its a £1400 set up. My other option is to go for the pre along with the 8000p