Home Defense Firearm Suggestion..

I had always thought about purchasing a small handgun for home defense at some point in my life, but today might have just expedited my time table a little - because I was woken up by I believe someone trying to break into my home... I live with my sister - she gave me the whole finished basement as my room - just a little backstory so it makes sense when i explain what happened..... well, i was woken up by what sounded like someone forcefully tapping the glass to the basement window - at the same time, i heard the neighbor's dog barking, and barking, and barking... when i woke up and looked toward the window - there was a man (couldn't make out the face) attemping to pry open the basement window with a screwdriver.... as quickly as i saw him, he was gone - he just got up and left....... i dont scare easy, i'm all 6'1 300 lbs of man (and not all fat either lol) - needless to say i am imposing at first glance - but this has left me a little shaken..

anyway, i have always thought about buying a handgun - and i may actually use my tax return money to purchase one this year... and since i am a Bond fanboy, I have thought about buying a Walther PPK.. this one in fact..

http://www.budsgunshop.com/catalog/product_info.php/cPath/21_55/products_id/61094/Walther+PPKS+.380acp+Stainless,+7+round

i would greatly appreciate any other suggestions from those who own, or know their guns - and what would be best, but also reasonably priced..