Good Broadband: Shoud be. I don't think Reading is quite the blackhole Basingstoke is.
Proper Shower: I guess shouldn't be a problem to fit one if need be!
But otherwise completely agree.
Ample Parking: Might be a sticking point with a flat. I would guess one space is the minimum and two is you're lucky. Three or four might mean using the visitor bays permanently.
I believe you can get joint mortgages on a shared ownership as my step-sister and her boyfriend did one, and they weren't offically joined in any way.
I guess you would want to be near a good road for ease of access? My Mum actually brought up a good point that I would probably be commuting the other way to everyone else (out of the city and away from London), so it might not be such a big concern for me as I first thought. Still, I would probably replace the ST220!