I've really enjoyed the many contributions to this thread, particularly the more recent ones with regard to Eddie Gilbert. Thanks to all concerned. With regard to the initial thread, I was interested to read of the possible alternatives to the side I named. I'll preface my comments that my selections were and are based almost purely on statistical evidence.
Starting with the specialist bowlers, I didn't consider Mark Harrity (216 w @ 29.3) and Wayne Prior (140 @ 33.0) due to their averages. Mark Cameron only took 45 first class wickets which I considered insufficient for inclusion. However, there could be no denying the credentials of Matthew Innes (281 @ 25.7)
My initial side was obviously missing an all-rounder and both Ashley Noffke (3,508 r @ 26.8; 374 w @ 28.6) and Damien Wright (3,824 @ 23.5; 406 @ 28.7) would have strengthened an obvious tail. I had forgotten about Bill Alley, probably because he played most of his cricket in England, but his career stats are impressive (19,612 @ 31.9 including 31 centuries and 768 w @ 22.6). My interest was piqued at the mention of Cec Pepper who was regarded at the time as the next best Australian all-rounder behind Keith Miller. However, his figures (1,927 @ 29.6; 171 w @ 29.3) certainly wouldn't place him above Alley.
All the bowlers named were either fast or medium fast and there were no alternative spin options put forward to replace Hopurne.
When we look at specialist batsmen only Ryan Campbell (6.009 @ 36.4) was put forward.
When it came to the choice of wicket-keeper, Berry's batting came into question. Wade Seccombe had solid credentials but his batting average (24.5) was only marginally better than Berry's. On the other hand, Chris Hartley (6,138 @ 34.5) would certainly strengthen the lower order.
Having considered all your contributions, here is my revised Best Australian XI players who never played Tests.
M.Di Venuto 24,518 FC runs @ 46.4
J.Cox 18,614 @ 42.7
J.Siddons 11,587 @ 44.9
D.Hussey 14,280 @ 50.5
S.Trimble 10,282 @ 41.8
B.Alley 19,612 @ 31.9 & 768 w @ 22.6
C.Hartley 562 dismissals & 6,138 @ 34.5
A.Knoffke 3,508 @ 26.7 & 374 w @ 28.6
M.Innes 281 w @ 25.7
E.Gilbert 87w @ 28.9
D.Hourne 164 w @ 28.7
12th man M.Klinger 11,320 @ 39.3