Lincoln,
I'm using (primarily) Ohm 100 omnis with DRC subwoofers. This is a full bandwidth (my main issue with both the ProAC and deCapo), though highly inneficent speaker system. Definitely not what you're looking for.
I also use the Merlin VSM which loves tubes, meets your sensitivity requirements, and has a small footprint (it is a floorstander, however). Tonally, it's response is pretty similar to the R2 through the range that they share, but the VSM is much better balanced IMHO due to its extended bass response. However, I'm pretty sure that a decent used pair (even an early version) would be over budget. Merlin also makes a monitor version (TSM) of the design that might be viable for you, but I honestly don't know that product at all and I mention it only because the VSM is such a goofd fit for you on all fronts but (alas) price.
Marty
I'm using (primarily) Ohm 100 omnis with DRC subwoofers. This is a full bandwidth (my main issue with both the ProAC and deCapo), though highly inneficent speaker system. Definitely not what you're looking for.
I also use the Merlin VSM which loves tubes, meets your sensitivity requirements, and has a small footprint (it is a floorstander, however). Tonally, it's response is pretty similar to the R2 through the range that they share, but the VSM is much better balanced IMHO due to its extended bass response. However, I'm pretty sure that a decent used pair (even an early version) would be over budget. Merlin also makes a monitor version (TSM) of the design that might be viable for you, but I honestly don't know that product at all and I mention it only because the VSM is such a goofd fit for you on all fronts but (alas) price.
Marty