I've used three different monoblocks on my Guarneri's. The first was a pair of Bryston 7B ST's, which were a bit dry with the Guarneir's and definitely overkill in the power dept. I then switched to Aronov 9100 monoblocks with KT99 output tubes (about 130 watts), and these kept me VERY happy for a couple of years. The Aronov's had very good control of the bass, a reasonably tubey midrange, and nicely extended highs. Then came the CJ Premier 8 in XS configuration (about 120 watts per side of EL-34 triode power). Night and day. By far the best sound I've gotten out of the G's, with a much more realistic, palpable image, awesome transient attack and decay, etc, etc. CJ monoblocks are a good match with the G's, but they don't do balanced (I use custom terminated AQ cables with XLR's on the preamp end and RCA's to the amps), and they have one set of binding posts. However, my speaker cables are set up for internal biwiring, so no a problem. Another option is to have a set of jumpers made out of the same high quality speaker cables and ditch the pretty but sonically crappy SF jumpers. This works well also
