Carve and Red Bread,
Thank you so much for the info guys! As newbie as I am, it's difficult for me to make any decisions, let alone right ones. The reasons why I bought this Diamonback bike (checked after work, I got 2011 model) are 1) I did not want to spend a lot to try it out, and 2) SA had this bike on sale and in addition I had 25% coupon. After adding 3 year extended warranty ($60) my total for bike, warranty, and sales tax came out to $260. I would not even get warranty, but 3 year warranty includes 2 annual tune-ups.
Carve, those bikes do look lot nicer, so may be in a year if I like it and still doing it, I can probably sell my bike on craigslist and buy something better.
If you guys think I made a mistake, please let me know. I'm not riding it until Sunday, so there is time to return it. Might even be able to return it after I ride it, but I would not want to return used bike. May try to visit bike shop, I found one near me.
Many thanks for bringing up bike shorts. I would not think about getting them.
What do you guys think about these ones:
http://www.amazon.com/Canari-Cycling...9515050&sr=8-2
or these
http://www.amazon.com/Pearl-iZUMi-Qu...9515050&sr=8-1
Thanks again for your input!