Which would you choose? Primaluna Int vs Separate

I currently have a PrimaLuna Dialogue 1 that was upgraded a bit to almost be a Dialogue two with improved caps and Gold Lion KT88 tubes. I'm now using it with KT120s and I've been very happy with it powering my B&W N805s. But I recently got a great deal on a set of Nautilus 803s that I've always wanted. Even though I like them with the PL Dialogue, I'm thinking a bit more power may wake them up even more. Now I have a chance to move up to PrimaLuna Prologue three preamp and Prologue seven monoblocks for a thousand bucks difference.

If you've heard both, what do you think? It's a step down from Dialogue to Prologue series. But it's a step up to separates and more power. Overall is it a step up? And is it enough of a step up to justify a thousand bucks?

By the way-- I went to a local dealer today and listened to the Prologue Premium compared to the Mcintosh 6300 on a set of 803Diamonds. The difference wasn't nearly as much as I had expected. The PL had a sweeter midrange with its EL34 tubes and handled the speakers really well. The Mc was very nice too and had a touch more control in the lower bass, but it wasn't as dramatic of a difference as I expected. It was not worth the extra $1500 to trade up (the Mc was a demo model listed at $3k) IMO.

I typically listen at moderate levels, and listen mostly to rock, like Dire Straits, Boston, Fleetwood Mac, etc.