I say keep what you have unless you have a burning desire to blow some cash on a new filter, and if so I say more power to you. I agree with the above comments in regards to media. I have a Penguin that I simply put some bioblocks in. The wheel worked for awhile but become a snail amusement ride, so I tossed it and haven't missed it yet. I find that tank to be as clean as those with more sophisticated filters, and there are no leaking worries, hoses to pop off, or buyers remorse from realizing you keep the tank clean after-all, not the filter
Dave