Keep in mind that in some tld's (like .nl) the whois data actually dictates who is the legal owner of the domain. If you get into an argument with your registrar, and the whois data shows their name, you can't take action to move it or reclaim it without their approval.
Also if you let it expire, for the cool off period, only the original owner can reactivate it, that means you can't reactivate it through another registrar. Maybe your current registrar allows it, bit that's a maybe.
Keep in mind that in some tld's (like .nl) the whois data actually dictates who is the legal owner of the domain. If you get into an argument with your registrar, and the whois data shows their name, you can't take action to move it or reclaim it without their approval.
Also if you let it expire, for the cool off period, only the original owner can reactivate it, that means you can't reactivate it through another registrar. Maybe your current registrar allows it, bit that's a maybe.