Its a matter of what you are happy with and personal choice really. Mine were not as bad as those but i changed them as although i could polish the metal- as the chrome and long-gone on the downpipes- they still rusted and i was kidding myself.
I didnt want a MOTAD or similar and as luck would have it, DSS started to do the replica set, which although are single-skinned and have two clamps at the collector-box- made me happy and took a bit of fitting, but were a vast improvemnt on what I had fitted. Come to think of it, mine were a mixture anyway of at least 3 sets of 2nd hand ones.
The exhaust , the seat, the headlight were probably my best purchases after id got my non-runner running again and dealt with the essentials to make the bike rideable.
Some bikes on here are perfect and a credit to thier owners who have toiled and spend lots of cash achieving what they are happy with- I, on the other hand, do not have the budget but as I said- you have to be happy with what you ride. And thats all that matters!