I would definitely recommend giving CODA a good look. They have several SS amps in that price range that would excel at the characteristics you are looking for. They run cool (for Class A) and CODA amps are fast and articulate, while retaining a smooth, warm sound not typically associated with SS amps. Pass is also a good choice, but CODA is every bit as good, and typically less expensive. CODA doesn't advertise and they are not as well-known as some competitors, but they are extremely well made and offer a great value.
The CODA 5.5, or maybe a used CODA 8 would be good choices. The CODA 16 is a great amp but would be beyond your stated budget.
Good Luck