Not sure why you are tearing down the tank, even for Ick. Ick is one of the easier diseases to cure IF you follow the correct instructions on how to handle it here
. If it was Ick as it could be Epistylis...
As far as your tank equipment goes, if you are only going to have one filter I would go for the bigger Polar Aurora filter for only $15 more. If you are still going to use the Marineland 350, the smaller canister will be fine. I do suggest using both filters.
Plants and fish, others will be able to help better I'm sure.
EDIT: Keep your old media wet and DON'T wash it out as you will need it to hold your bacteria cycle in the tank when filled with new water. Add your de chlorinator too!