I'm after a new all-singing all-dancing autoeverything SLR which I won't hand control over to. Among the current favourites is an EOS 30/33. Canon's 28-105 and 28-135 IS don't seem to be that highly regarded. I can't afford their L range but want a good zoom for convenience when travelling. Would I loose out on anything by getting a Tamron 24-135. Autofocus speed? Increased noise? Any camera functions? This lens seems popular with reviewers and users alike but not having the kit to try out for more than a few minutes in a shop it's hard to tell. Any comments? It's likely to be my only lens for this camera for a while. Thanks.