I actually looked into Back Bay towers when looking for a place and found them to be pretty pricy. They also charge you about $100/month to park your car because the only parking is their underground garage. Other than that I really don't know much about them.
I live in South Portland in a new townhouse community called Conifer Woods. 2BR, 1 bath with full basement, W/D hookups. Plus we have propane monitor heat which adds up to a pretty cheap heating bill even in the dead of winter. I can give you the landlord's number if you might be interested.
If you are interested in living in Portland I recommend
www.mainerentalguide.com. It's a pretty comprehensive website that lists some nice places in the area. Also try
www.portlandme.about.com.
Portland is a geat place to live. When you want to get out and do something fun it is only right out your front door. Most classmates live in the Biddo/Saco area but there are a handful of us who live outside the area. And the commute to school is not bad-35 minutes tops. I personally need the separation of school vs home to keep my sanity.
Hope that helps- Good luck!