Not sure if I have enough oomph.

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.  

Try it with krell if don't like it bi amp it use krell for base and find a amp for the upper end I have the salon 1 and like it.im running 1k through it.it may be people aren't running enough wat5s through to get all the speakers singing.i have not tried the tube amp on the top end yet.so much fun not enough time.have fun you'll like them and enjoy the music