Needless worry
I wouldn't fret over the warranty expiration. As long as you don't drop, abuse, keep staples/small metallic objects near the magsafe or spill stuff on it and just continue using your MBP, you'll be good for another 1-2yrs. If parts like the hard drive, RAM, keyboard/trackpad, etc should falter, replace them via iFixit.com and order the parts. Do it yourself or have a computer tech do it. It's pretty easy. If, to you, the value of repair cost out weigh a new laptop, replace the MBP, all things being relative.
I, for one, had a 06 MBP (A1151) which lasted 4.5yrs. It's logic board died and I decided not to fix it and buy a new model. Granted repair cost was quoted at about $700-900, not including labor. (Surely, I would've done the repairs myself.) I got a lot of use out of the 06 and got my 2010 uMBP i7 recently because the value of repair and buying new was palatable for my situation (the relative part). Anyway, honestly, I was pining for a new MBP and I did have the finances for it. I'm happy my lost turned out this way...she's a sweet machine!
Anyhow, there's a lot of good advice here, and you should proceed whichever makes you comfortable.
Mel