300 Watt Tube Monoblocks

Just to mention, much is conservatively rated, i.e. my SS MC2250 was rated at 250 wpc, but tested within spec at 305 wpc by McIntosh at a white coat lab day at Harveys back in the day

so, maybe check out 250 wpc tube stuff as well,

what impedance are your speakers?

IF you consider bridging amps to make a pair, often the impedance choices get limited.

Convergent JL7HPA:

• Power: 300 Watts, 1%THD
  (400 Watts into 2.5 ohms)
• THD @ 1 Watt: 0.005%
• Energy Storage: 3600 joules per pair
• Bandwidth: 20 Hz to 20 kHz (+/- 0.1dB)
• Damping Factor: 14, across entire audio band
• Gain: 25dB
• Input Impedance: 100K ohms single ended
  200K ohms balanced
• Sensitivity: 1.5 VAC for full power
• Noise: 120 dB below full power
• Power Bandwidth: 20 Hz to 30 kHz
• Tube Compliment: 2 x 6922 driver and power supply
  8 x KT120, triode mode

McIntosh MC3500 Mk2

Please, unless you've just received an absolutely large inheritance that you feel obligated to spend, you don't need 300 watts of power. Now, of course, if you're trying to drive super inefficient speakers or load an extremely large listening area with sound it may be prudent.

If not, find a McIntosh MC-275 of a more recent vintage and thank your lucky stars for not only how great it will sound, but for the bread you will save. Figure between 4,000-7,000  grand between used or new for HI-FI nirvana!