Hi T-Rod,
Welcome to IIS
I feel you would do better to buy a more substantial scope. 4.5" just isn't going to keep your interest for very long at all. You'll be limited to to viewing only the brighter objects in the night sky.
You can pick up a 6" dob for $299, or an 8" dob for $549 from here
http://www.andrewscom.com.au/site-section-10.htm
If you're quick they have one only 10" for just $599.
(I'm not affiliated with Andrews btw, just love their bargain prices
)