Considering we seem to be over the worst of our injuries and have gotten the top four out of the way (villa, arsenal, l pool, and city) I could see us going on a good run.
I think 6th is certainly possible, but the issue is I think it comes down to us getting a result against man u at old Trafford and I just don't see us beating them a fourth time in a row particularlly on their home turf.
That being said does it actually matter? Assuming we get five champions league places next year and Liverpool will be one of those, that means 6th, 7th and maybe even 8th goes to Europa? In that scenario not much difference finishing 6th or 7th.