Yes, the MB1's w/ a 7B stack compare very favorably against the vast majority of our competition... Consider yourself a lucky man to have such a kit in your home!

.... Now, you can make a few comparisons between your MB1's and later incarnations. There is the MB2+ which featured a (at the time) newly designed soft dome tweeter. Unlike the metal dome found on the MB1 the soft dome will give you a bit higher resolution, this combined with our handmade soft dome midrange made for much more focused soundstage. With the new drivers came a new crossover making it all happen. Overall the MB1, while not a slouch in the least

, is inferior to the MB2+... We will never replace a model without marked improvements across the board.... Now the MB2i is latest incarnation of the beast. The differences are more extensive with this version. A new Solonex tweeter was co-developed between SEAS and PMC, quite possible our best tweeter ever, with out going into the Active series..... So with the new tweeter the resolution and "air" has been improved yet again! With the tweeter comes yet another crossover. All driver units are crossed at -24db/oct, so three drivers are acting as one. Also improved is the cabinet material - MDF is banned in England becuase of its toxicity. We now use Medite, made in the same fashion as paper, it is much more dense. This combined with our new cabinet construction method our the MB2i's bass response is improved remarkably. This is a generational improvement over your MB1's... Then there are the cosmetic upgrades - glossier cabinets, polished metal badges, sustainably famred real wood veneers that surround the cabinet.
So you will find the differences between 1's, 2's and the new i's, as you go up the generational ladder the performance to be quite staggering. The i-series, across the board, from the DB1i to the MB2i XBD is easily our best looking, highest performing, and also most environmentally sound product to date.
Curiously, where did you purchase your MB1?