Vienna Acoustics vs Revel Studios?

Three years ago, I invested in a system that has given me many hours of listening pleasure. I have Vienna Acoustics Beethoven speakers, a SimAudio I-5 integrated, and an Ultech CD player. At that time, that was about as much as my budget would allow, and I have never regretted buying any part of this system. The only "problem" I am having is that the system lacks "rock out' power. It is perfect for moderate listening, but will occasionally clip or become slightly shrill or unfocused when "cranked."

So now, of course, I'm pondering all kinds of potential remedies. I could simply use the I-5 as a pre-amp and add something like a Bryston 7B ST for extra volume. I could sell the I-5 and go for separates, maybe even try out some tubes, such as the Sonic Frontiers Power 3 set-up (although I have heard that tubes are not necessarily a good match for the 'warm' Vienna speakers). Or I could sell the system and try out the Revel Studios (I think the Salons are probably too big for my living room) with some combination of the above to drive them.

I am not a true audiophile, in the sense that I know an awful lot about this stuff, but I do know that I enjoy good music played on a good system. I don't mind paying for top notch equipment, within reason, but I don't want to fork over 10-12K when a modest adjustment in my current set-up would be almost as good.

So, I appeal to all of you true audiphiles for advice. Please show me the way. Would the Revels be a big step up from the Viennas? Would separates be much better than adding an amp, while using the I-5 as a pre-amp? Any suggestions on possible matches?

I realize the answers are, to some degree, subjective. But I am interested in your feedback and experiences.

Many thanks.