@ Burgey
My rationale for rating Murali so highly is that when directly comparing McG of 95-05 with Murali of 98-08(picked Murali's best 11 year period as it's unfair on Murali to compare his longer career with a shorter one and the >40 average bowler Macca was in his first two years isn't anyway representative of the rest of his ATG career),
McG - 520 in 110 @ 20.63, 4.7 wpm
Murali - 631 in 90 @ 19.94, 7 wpm
While McG definitely has a more complete record and Murali being **** in Oz has to count against him, I'll still pick Murali for the reason that he took a significantly higher number of wickets a game than Macca
while still averaging 20. I belong to the school of thought that it's a greater achievement and gets harder to maintain take wickets cheaply on average when you don't have much support. So while I think it's be more of an impossible split(It already is) if Murali actually took wickets at five runs more per wicket, At this stage, I'll take Murali.
The quality of Murali is something one cannot appreciate fully by seeing alone, IMHO. Because you obviously see he's ATG quality when he's bowling but you also see that in a few other bowlers(McG, for one) but his real effectiveness is in that he never stops bowling, I think it's remarkable how much better than anyone else for donkey's years he is at taking 10-fers. He has 22. That is just creepy. Obviously him not having someone seriously competing for wickets is a huge contributing factor but still it's amazing how often he was taking a majority of his team's wickets. Over his career he averages a five-fer every other game.
To put it extremely simply, I'd pick the bloke, for a career, who strikes every 50 balls and bowls 40 overs a match over a bloke who strikes every 50 balls and bowls 59 overs a match even though the first guy will be more consistent and get the best players out more often(which is the thing which makes it very close for me)
Obv, This entire post is based on my belief that the more you bowl per match, The less the chance of you maintaining a lower bowling average. If you disagree, that's fine.