First let me apologise for the blank message I sent this morning

I was going to say that it does depend on what kind of reverb you
want. 

I have a small collection of Italian church reverberations, Upsala
Domkyrkan and the Stockholm underground station Ostermalmstorg.  These
I use with convolve

I also have Josep's collection of ~35 synthetic reverbs which can be
useful, and Hans' modelling of Lexicon.  These are sometimes what I
want.

Then there is dconv, pconv and filter to apply a convolution, and my
own recordings of explosions in Berlin TU, Tate Modern and the
like.

Define "Top Quality" and we may have better answers!

==John ffitch