There is no best… It’s all subjective and the level of comfort is different on an individual basis.
Look, it’s fine that you ask where to look for hardware BUT… and I repeat BUT… don’t ask people what’s the best this or that because we all have our own individual preferences!
This is the biggest mistake I see new members make all the time. I can’t tell you what’s best – I have my own comfort zone and stick to that. Other people have their preferences and comfort zones. Don’t confuse opinion with fact; they’re completely separate things.
Getting the exact same joystick as a top tourney player like Daigo or any of the American players will not make you an expert. That takes years, and, granted, some inborn talent in addition to practice.
As for clunking, an LS-32 should NOT be making a noise like that NOR should a brand new, stock-condition LS-32 be excessively tight.
Yes, an LS-32 spring has greater tension than a Sanwa JLF BUT it’s not that much tighter unless you install extra springs. Yes, you can put lesser tension springs on the joystick but that really doesn’t make much sense. If anything it will ruin the stick’s ability to recenter itself quickly. It’s better to up the tension in an LS-32 OR replace the original spring if need-be. That’s one of the big advantages it has over the JLF in addition to quicker switch activation and easier roll motions.
If you don’t mind, take the LS-32 apart and make sure that the spring is what it should be and/or that there is nothing getting twisted up in the joystick like electrical wiring.
Again, this “CLUNK” you speak of I haven’t experienced. I end up splitting an extra LS-32 spring in half and screwing that onto the original stick (another LS-32) spring. Never experienced any kind of “clunking” noise and my set-up isn’t that tight, either. A stock LS-32 is barely tenser/tighter than a stock LS-40 and THAT’S a loose joystick by most standards!