If you do decide on the Ammit 25 I'm confident you'll like it. Never had a leak on it either, leaking is down to wicking problems without doubt (unless someone gets a faulty one). I find it better not to over-stuff the coils on this and the wicks are also better thinned out, not crammed tight into the wells and again, not over stuffed with cotton doubling up. The wicks need to just cover up the juice flow holes, not block them up tight. The airflow is good on it too and it's not whistly. I find it almost as good as several of the RDAs I've tried, and much more convenient! I still keep it in rotation but find I use the Serpent SMM a bit more, seems to cope with creams and delicate fruits better, no idea why, it just does, and that's trying duplicate builds across both at same wattage / juice etc.
I find the Ammit doesn't do too well with cream juices or the more delicate fruit flavours like banana, regardless of the build, very muted. With the stronger flavours like mango / blackcurrant it delivers a lot of flavour. I've also had variable results with fancy coils in it. One of the best builds I have with it for heavier / sweeter juices (that can gunk up coils and wicks easily) is 22 ga, SS316, 5-6 wraps (contact), around 0.25Ω. This build I find stays very clean for ages, good with both contact and spaced. Of the fancy coils I quite like a flat clapton, Ni80 4*28+40, clean burning and don't clog easily, wasn't impressed using aliens in it or some of the uber fancy coils, not needed IMO. All of this is personal preference of course. As with any RTA (and even RDAs), expect to put a tank through it before the flavour really comes out and don't be tempted to ramp the wattage up too high chasing flavour until the wick has settled in.
Of the tanks I've got and tried (a buddy of mine is a collector of this gear I think!!), around 50, I only keep four in rotation: Ammit 25, Serpent SMM (both RTAs), Recurve and Nudge 22 (both RDAs) and all single coil bliss!