The SpeedStir is a must. Patting my head and rubbing my stomach at the same time makes me dizzy so swirling and dropping at the same time makes me crazy. The SpeedStir solves that!
Other items are up to you. I have never bothered with a salt test as we never have a pool that overflows. When I add my salt it stays essentially the same until I drain the pool and start over. The salt does not leave the pool due to evaporation, which is essentially the only reason we have to add water to our pools.
You do not need the XL option. What comes in the kit will get you through one season. Buy new reagents every spring.
Some love the sample sizer. I just don't think you have to have that kind of accuracy. Depends on how precise you want to be.
Are you getting a robot? If not, get the Whale Tail brush. The thing is magic at brushing the walls.
I'll order the TF-100 today. I think I read somewhere that they give a discount to TFP members, we'll see.
We do want to get a robot (I assume that is the automatic pool sweep). Our PB quoted a Hayward 4 Wheel Pool Cleaner w/ Leaf Catcher for $550, but we still need to research on TFP as to what to look for in a robot. I did read up on the Whale Tail Brush, it was not very expensive, and might be good to have as a backup.
Not sure if I read somewhere that you should not use a robot until your pool has completely cured ... but more reading will address that. I do have a robot question you may have an answer to. We will have 3 wide steps entering the pool (14' wide x 2'). Will the robot automatically get those as well, or will those need to be manually swept?