What's the benefit of staying in BGs at 39? Isn't the best honor awarded when you're at 70? I'd just power through to lvl 70 and then focus on BGs. I mean, outside of the generous dailies that is.
Basically you dont want to go to 70 and pvp because of how the bracket system works.
10-19/20-29/30-39/40-49/50-59/60-69/70
The exception of course being EotS which starts at 60-69/70 and AV which starts at 60 and ends at 70. Thankfully since AV is a raid focused bg, the bracket means less in the long run.
So anyway so you wait till 70 to pvp, you arrive in 70 battlegrounds vs S1-3 or T5/6 equipped 70s in your podunk instance/quest reward greens and blues and get murdered.
Its much better to at the very least stop at 69 and grind honor for S1 gear. There's also the argument of actually learning your class pvp before 70 so you arent the person everyone laughs at in battlegrounds. For this reason I almost support a 59 grind for the 60 pvp epics from pre-bc. This is a good idea for a couple reasons:
A.) Learn your fucking class. Dont be a goddamned moron in PVP IF YOU ARE 70 and cant play well in PVP you messed up!
B.) The 60 epic stuff isnt too shabby. Sure, maybe the entire set isnt useful, but at least two pieces per class can be useful all the way up to 69.
As for the SM run tonight, it was fun, plus its a lot easier to do SM when it doesnt take 3-4 hours.