hey
I bought the Meta 6.2 a few weeks ago and have been very pleased with it. I think the cracks have mainly been with the meta 5's although I do know of at least 1 cracked meta 6. Having said that Commencal seem to be replacing frames without too much fuss, so buy an '09 and get a free replacement '10! Check the commencal owners club website via the main site.
I bought the large and was also concerned about the head angle. I have the Lyric solo air fork which came as standard and am running Bontrager Big Earl Tires, 2.5 front and 2.35 rear. I have checked the head angle using an ipod touch app (a good one) and it registers at 65.8 degrees, I am also running the the headtube sleeve at -0.5 degrees.
Before anyone pipes up about the accuracy of these apps I have done a back to back check against my other bike, an orange 5. The orange registers at 67 degrees which is exactly what its supposed to be, therefore even if the numbers arent accurate the Meta is still over 1 degree slacker. I did check it prior to changing the tires on the meta and it was still over half a degree slacker than the orange.
All these measurements are static by the way.
The bottom line is that the meta rides really well and has a great spec, especially as I got £800 of rrp! It isnt as well built as the orange imo and too be honest I would have gone for an Alpine 160 had it been the same price but I would have had to spend another grand!
The meta 6 is best suited to going downhill though which it does really well, I have found that steep technical descents that were 'sketchy' on the orange 5 are effortless on the meta 6, which of course means I have now been able to up my game a little. The only downside has been weight, around 35.5lbs. You should also budget for a sensible width bar and to replace the ridiculous stem! Other than that I prefer it to the five!!