Power amp for my Read Pre??

Am currently running a Stewart 2.1 and Its got crazy power, but are there other amps out there equal OR better than the Stewart? There are so many brands its almost mind boggling. I know they dont make the 2.1 anymore so Id be screwed if it failed. Can you give me ideas on what you guys have experience with and like? I want super clean and powerful. I run 2 Eden XST 410 cabs usually and sometimes my GS412.........both of these setups crave big power. Thanks!!!!