i have a 55 gallon fish tank that i have an oscar in and i have a regular filter that hangs on the back of the tank that takes 2 filter and a tube that goes in the tank that sucks up the water and i was planning on changing the filter and was wondering what any of you would suggest to go with

I would get a cannister filter, they are the best for the tank size you have. They will have ratings for tank size. These ratings are for normal tanks like community fish, oscars are messy fish so you need bigger filters. You will need one that is rated for a tank twice the size you have, ie a filter that is rated for a 110g tank. The best are fluvals or eheims. I like fluvals, a 405 would do the trick. Remember you cannot over filter so it doesnt matter if your filter is too big for your tank

un like dellboy i like ehiems the 2217 wouls good for a 55 gal with an oscar

Id wait for Fluval g if i were u . its freggin awesome

tetratec ex1200 powerful.ultra quiet better made than a 405 in material quality comes with a spraybar all media more selection than a 405 and cheep as well just my hummble opinion i have both filters so compared them my self