Not sure if I have enough oomph.

There is a ton of pop in those amps. Yes adequate for what you need. 2’s are not the easiest to drive out there. I passed up a pair because I didn’t have the amp to drive them at the time. Adding more power won't get a lot more. +3db to double the power. These Krell's have a lot of headroom for dynamic passages and absorb the electrical phase shift with ease. I would venture a guess and say they would actually work well together!

At first I thought that you were kidding! I think you'll be just fine.

The key here is the speaker impedance plot:

https://www.stereophile.com/content/revel-ultima-salon2-loudspeaker-measurements

This speaker has pretty low impedance (< 4 Ohms) for a wide range (20 to 100 Hz) in the bass.  This does imply that the speaker will be highly amplifier sensitive and auditioning it with different amplifiers will be helpful, or you could use it with a sub below 80 Hz.

I haven't heard yet a nice sounding setup with Revels in general.

While I've never owned any Revels (for probably reason of not being "my type of speaker"), but have heard them in various hi-end shops and into at least several shows and never Revel auditioning impressed me. Perhaps there's no amp that could drive them to open. Everything was as-if the sound was preserved in each of the speaker boxes and never went out.
I think you should aim for something that will give you closer to 1kw per channel.

Why not wait to hear the set up before going off in search of another amp?  I cannot think of a speaker that really "needs" more than the 240 wpc you can get out of the Krell; if the sound disappoints, it is not for lack of power.