I have tried a lot of the aforementioned switches, and the truth is, this is a really good time if you like MX heavy tactiles.
The T1s do have the problem with leaf and spring noise. The Kiwis are T1s that may be built to a slightly higher standard. The truth is, people usually build Kiwis as customs, so they are definitely lubed, sometimes filmed, and sometimes springs are replaced. You can definitely build a Kiwi into a nice custom switch.
The T1 has other clones such as the SP Star Purple [which seems very similar, operates nicely with MT3 ABS].
I just received 5 samples of U4T stems. I haven't even mounted them yet, but am testing them in Boba [very stable] and Cherry housings. The Cherry MX Browns don't seem to make a good housing for them, Boba is of course.
You can use higher spring weights with the U4Ts, if that's what you're looking for. It's a smooth stem and versatile. I have seen people using it with 78 G springs.
The Holy Bobas are actually quite fun. I have build samples in a number of different weights. They feel very 'definite' and crisp to me, but with a somewhat rounded feel. They are LOUD, so I don't really use them, but they seem fun. I like them in the light 63.5 and 68 P weights. 68 P is especially awesome as a light Holy Boba. But I guess you would want to run them in higher weights. [Maybe try 78 G progressive? They seem to do okay with Progressive springs.]
I have read reports that the early Boba housings might have given some scratch or leaf noise or something with the Halo stems in the Holy Bobas. I haven't experienced that myself, but it is now recommended that you use whatever the latest Boba housings are if you are building Holy Bobas. [They are definitely worth building and maybe the most fun use of the Boba housing].
I have read that the Blueberries are an interesting switch to type on, although they are very divisive. If you are interested in possible 2-stage or exotic MX tactiles, you might want to look into the 'Kangaroo' switches as well.
Also, you can apparently use a Silent Sky stem in a Boba housing with 68 G + springs, and it will have decent tactility.
With T1s [really you should use Kiwis or SP Star], U4T, and Holy Bobas out there, there is a good deal to pick from, especially if you include the more exotic switches. You can also frankenswitch the T1 housing to create things like Taliaz, which is Aliaz in a T1 housing [which really pops.] MX Brown stems and similar [maybe TTC Gold Brown] become very poppy in YOK Panda housings.