At your level of experience, I would not spend that kind of money on a fish. First, you don't know if you are going to burn out on the hobby yet. (It happens a lot.) Second, the more expensive fish are often (not always) harder to keep than the average fish. This is not always true.
Now, if you find someone leaving the hobby with a healthy captive specimen already, that could be a good choice. It at least gets your past the stage everyone (no matter how experienced) goes through -- is this fish cyanide caught? has some disease I can't or don't know how to treat for? has starved so long it's unable to digest food anymore? etc.
However, how long you CAN keep it will also depend on the lifespan of the fish. Some fish just don't live very long, and if they are wild collected, you don't know their age.
You can always remind your wife that maroons live to be ~30 years old with good care.
Citron gobies (and related variants) are pretty and good aquarium specimens. They will, however, strip a portion of an acro to nest in (if there is one) and some SPS keeps report that their habit of hanging out in the acro bothers the corals and this can harm frags and other smaller or less healthy corals. They DON'T eat them, as some people seem to think.
Kept in pairs (and any two will make a pair), they will almost certainly spawn. They are believed to have a relatively short lifespan (~5 years)
And any basslet will almost certainly ignore the goby. The basslets that are more peaceful would probably be out and about in your tank (if you have sufficient hiding places) since neither the maroons nor the goby are particularly spastic.
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