I've got 'em all, including the Streetly SFX for M-Tron Pro. I quite enjoy the sounds! It is interesting to compare M-Tron Pro and the M4000D. Some sounds I find I cannot tell the difference between the 2; for example the MKII 3 violins. However in others there is a huge difference-Pipe organ-Streetly blows away the M4000D version! However the M4000D has ease of use advantages when playing live. The M-Tron Pro is more useful for recordings.
Dan Miso
2 M400's; 8 racks of tapes
M-Tron Pro; incl. Streetly 1, 2, 3 and SFX
M4000D rackmount; 200 sounds.