Hey there!
Cherry MX Blues are probably the most tactile Cherry switch when they are stock. However, I would like to say that Cherry isn't the best way to get into MKs in my opinion.
But let's put opinions aside, and see what I can do.
(closest to blues minus the huge click right?)
This is not true. Browns and Blues are completely different in terms of tactility. Browns have a small notch in the slider (the cross pin thingy) and that jitters the key travel a little. The tactility is very weak, and Browns don't feel much different than Reds from what I've felt.
Are the switches soldered in there, or can you remove the keycap, then the switch casing to simply replace the switch itself? Or will removing and resoldering be required (I won't bother if this is the case)
This is actually a good question. I believe that Corsair soldered in the switches, so this wouldn't help ya. But it might be modular, not sure though.
If you buy Blue switches and you want the strong(ish) tactility without the click, maybe consider the Jailhouse Blue mod. Here's a link if you're interested:
https://geekhack.org/index.php?topic=38091.0Hope I've helped you at all! If you have questions, please feel free to ask!
-IBMPCDOS5