How about a TX-2000, it would bridge the gap between the "2" components and the NS-1000 speakers (it has a "2" and three zeros in it)...and it is a most excellent tuner as well
The GT-2000 (/L/X) would do that just as well!
For whatever it's worth, I can confirm that the B-2 and NS-1000 combination is very sweet, indeed.
:yes: A little-known (or else just seldom-mentioned) fact is that the B-2's internal wiring is all SILVER, not copper. Only a large plate is copper, not any of the wires. They even used silver-based solder to connect those wires. Hard to find another major-brand commercial unit that can make that statement.
The other thing I'd suggest is that if you still want to with a Yamaha system, you might consider moving up from the PX-2 to the GT-2000 (read what Theophile said in his posts when he made exactly that upgrade, if you are hesitating), and are not stuck on the "2" thing too much, for an amp it's hard to beat the 101M in a Yamaha, although Mark B has said he somewhat prefers the sound of his (lower-powered) MX-10000 to that of the 101M. Get these units at the ends of your gear chain and you'll be playing with the same kind of gear that Mark B does ...and who knows Yamaha better? (I'm not sure what brutal has these days, but I'd bet he'd support these as good choices, too.)
[I know these amps and things are near-unobtanium in most areas, but they can be found in Japan, or even in Hong Kong (if you know whom to ask).]