Cheers guys.
An interesting side note is noise and facebook. Those shots I think were either ISO 3200 or 6400 (I probably could have gotten away with 2000-3200 but didn't want to risk it). I de-noised some, but left the rest. When I uploaded as standard to facebook, the photos were the noisiest images I've ever seen. Something to do with FB's compression creating noise-like artifacts I think. I deleted the album and uploaded in HQ at uni yesterday though and the noise is now (mostly) gone
I think the 70-200L will be my next lens...actually, thinking about it, if I can get rid of this unwanted second Tamron 17-50mm, and my EF-S Canon 17-85mm, I might just be able to afford one...
As to the pro's lens, I didn't catch what it was exactly, just sigma 70-300mm, will have a look at their range and see whether anything looks/sounds right. I was surprised when he commented it was near a grand, would have thought at that money he would have been better off with an L...
EDIT:
Maybe I was mistaken, as I can't see anything "good" by sigma that is in the 70-300mm range, pretty sure it was 300 and not 200mm too, strange. I'll be seeing him again no doubt either at the results party next month or before...