As a happy owner of ProAc 1SCs and Tablette 50 Signatures I would definitely recommend them especially if you're looking for small speakers that throw a large, spacious soundstage. When I owned Concertinos I was able to compare them directly to the Tab 50 Sigs and felt the ProAcs won in those categories handily.
Last weekend, I got together with A'Gon member Viggen for an afternoon audition of different equipment. The Tab 50 Sigs sounded very good through his 47 Labs Gaincard amp. We did a temporary trade where I took his Pass Aleph 3 home with me to compare to my Blue Circle BC22. I'm using a Blue Circle BC21 preamp. Through the BC21 the Aleph mates very well with the 1SCs.
The fact that you're leaning towards a tube integrated I feel is another plus for the ProAcs, as they seem to be at their best when tubes are in the path in front of them.
Last weekend, I got together with A'Gon member Viggen for an afternoon audition of different equipment. The Tab 50 Sigs sounded very good through his 47 Labs Gaincard amp. We did a temporary trade where I took his Pass Aleph 3 home with me to compare to my Blue Circle BC22. I'm using a Blue Circle BC21 preamp. Through the BC21 the Aleph mates very well with the 1SCs.
The fact that you're leaning towards a tube integrated I feel is another plus for the ProAcs, as they seem to be at their best when tubes are in the path in front of them.