Obviously, this really depends on your budget, and as @mayer said, how much you will use it. IMO, the FX-951 is a better option than the FX-888D because it uses the T15 range of tips and it can also support the micro pencil. That way, if you upgrade to the much better FM-203, then your tips and handles will migrate seamlessly.
If you are already anticipating going big time, then the FM-203 is an excellent station and it allows you to use the micro-tweezers. I love the micro-tweezers! There are even better stations from JBC (nano-tweezers) but those are even more expensive.
If your looking for a good quality hot air station, I would opt for the Quick 861DW.