I'm interested in this topic, too. I have bad hands can't rebuild. I tried, and even with the coiler method hot a great
variety pf coils. So I have to have drop-in coils. A slight twist though, I got a Wismec
Reuleaux 75W mostly for the squeeze firing instead of a button, and intend to get more while the 1 battery is still available. (See above about wonky hands.)
Anyhow, this Wismec has temp control available, and being a retired techie, if it can do it I need to try it out. On Fasttech there are a few of the drop in coils that are suitable for temp control. I also would like top fill if possible.I I don't care much about the drip tip as long as it's removable and has a 510 connection. I'm a sucker for fancy drip tips and have spares - or could use it as an excuse to get more. I can just keep looking but I'd rather hear from people who've used them.
As a side note I just had to get a new laptop, and thought that not having a back lit keyboard sounded good. But I can only type with one finger now (the appropriate one for my feelings about this) and my thumb for the space bar. Despite doing this for 5 years, it turns out that I haven't got touch typing down. So now I'm missing that back lit keyboard a lot.