You should purchase the truck you need for towing the fiver you either have, or the fiver you will be getting.
It is as simple as that. It you have to have the DRW to handle the pin weight then it really doesn't matter if it is hard to park, gets .5mpg less in fuel usage, or costs $50.00 more or less to maintain each month. It is the truck you need for the job you are using it for.
On the other hand if the anticipated weight isn't even close to needing a DRW truck then don't waste your money and stay with the convenience of a SRW.