Some quiet reading for you to research chips and what will work best FOR YOU and YOUR GOALS.
As for tuners versus chips Tunes you can not switch tunes on the fly you also will be limited to generic tunes or only one maybe two custom tuners and then you will be very limited in your choice again. In just about every way the chip is better choice. One thing that can be of confusion on here if you are somewhat new is the use of the term "tuner". On here we are almost never referring to the device called a "tuner" but the person that actually is writing the tunes themselves for the chips.
I would say, easily, 99%+ of members on here and most other dedicated 7.3 sites use a chip not a tuner.
One other thing to keep in mind: the maker of the popular chip used by many tuners to installed there tunes on is the "TS chip" )6 position chip). But that same manf also sell that chip with generic tunes directly to the public as well. So you will see comments about "TS style chips" from one of the custom tuners you are about to learn about with some reading. You want the ones from the custom tuners not the generic TS chip and tunes directly from TS or others. You will quickly understand the difference with some reading.
Of the various custom tuners out there these are the poplar ones with the best reps. Read the thread links below to learn more about them to help you make your choice:
Most every question you can have about chips the tuners who's tunes are run on them should be answered in the threads linked below. Including which is best, this tuner versus that, this chip versus that, etc... If not ask and I am sure you will get answers.