I'd vote for a 2nd hand Modwright KWA-150. That amp has great build quality, wonderfully warm, tube-like sound and amazing inner detail and resolution. It is a dual mono amp, so you really don't need mono blocks. However if you change to inefficient speakers later on & you find you need more power, the KWA-150 can be switched to Bridged mono mode via a toggle on the back & run as a mono block. It looks really good as well. Moreover, it should be a very reliable amp long-term. You should be able to pick up a 2nd hand example in excellent condition within your budget.