Welcome to AA
Sounds like youre off to a good start in the planning stages... i have a few suggestions for you though... First, i always get my tanks from craigslist, i can usually find 55g tanks for around $75 with pretty much everything needed to start out... if you want to buy new, you might check petsmart if you have one because their tanks are usually cheaper than the price you qouted... i prefer glass tops over the plastic hoods, have you looked in to those? also, i would check in to aquaclear filters... they are much better, imo
, last longer than the marineland, are quieter, and do a much better job filtering... seachems prime is the best dechlor ive found, and lasts about 5x longer than most others... save your money and ditch the air pump... theyre not needed and are an eye sore, my opinion once again...you should be able to order an API Master FW
Test kit for around $20 from most online pet supply places... What fish are you planning on stocking? Sounds like you already know how to cycle the tank, if you have any questions about that, there is a link in my signature explaining the whole process...