Walkden is a bit dull...
My Grandparents live in Walkden, while its great for them, quiet, full of old people. Its not ideal. Especially if you have been enjoying city centre living.
Personally I'd move into Ancoats well before Walkden

I probably should say, over 12 months at MM2, I really didnt have any problems to speak of. Though my parking was underground so I didnt worry about that aspect. Thing is with Ancoats, there is the huge Royal Mills development in that area, and the places in there are darned expensive (lovely too), so while the area may not be as.. posh, as some agents would like you to think, the general populous is always quite well off. I'd go and have a look myself, see how you feel about it, as an area its very varied, I really liked MM2 for example, yet a few backroads away, things look decidely less rosey. Very much like most of Manchester really.
What about the "Fresh!" development? Not sure how much things are in there, but it was reasonably nice when I had a look around and I know 3 beds in there were cheaper than nearly all other new 3 bed places. Bit small in places, but on the whole, quite nice.
I see IA have a 1 bed place in "Central Court" in Salford too. It's actually just outside the catchment of Manchester, so still clsoe the centre. It's a smallish place that unfortunately backs onto an estate, but it was all very secure. We had a look at a 3 bed and on the whole thought it was pretty good, not of the same standard as the NQ, but ok. Might be worth a look at least, though I cant see if it has parking (the place has secure parking though)