crazy how my opinion is exact oppositeLet me preface my comments by saying that I owned the previous version of the SHL5, and I understand that the latest version is quite a better.
The older SHL5 had a big sound (by Harbeth standards) but was soft, warm and woolly. Bass was loose and untidy. Highs were a little rolled off. I am told that the newer version corrects some of this.
The M30.1 is much more coherent, more focussed, with more detail, more tonal accuracy (although still warm compared to most speakers) and more refined high frequencies. Its bass is tighter but it doesn't go as low and the M30.1s unsurprisingly sound like a much smaller speaker than the SHL5s.
I suppose it will really depend on what sort of room you have and, of course, personal taste.
30.2
Oh no. They're not going to 'upgrade' the 30.1 and charge twice as much for it. Anyway, I have a pair of 30.1s sitting unused on a bedroom floor at the moment. They're very good in some ways, but below par with, e.g., piano (even in a decent sized listening room there is significant colourtion in the piano's mid-bass).
If they sort out that issue, then they would be excellent speakers.
Oh no. They're not going to 'upgrade' the 30.1 and charge twice as much for it. Anyway, I have a pair of 30.1s sitting unused on a bedroom floor at the moment. They're very good in some ways, but below par with, e.g., piano (even in a decent sized listening room there is significant colourtion in the piano's mid-bass).
If they sort out that issue, then they would be excellent speakers.