A couple of things to consider: With the Legends, you not only get the ability to lower the bike when wanted/needed, but also get 100% better suspension. If you decide to sell the bike, you can pull the Legends off the bike, put the stock stuff back on, and sell the Legends to recoup some of your money. Leaving them on the bike will not increase the value of the bike unless you find someone who is willing to pay the difference between book value and what you are asking above that because of what you've done to the bike. You never get your money out of anything additional you do to a bike...book value is book value.
If you put the FBI kit on the bike, it's not really something every future buyer may want/need. And with ABS brakes, you need additional parts. I'm seeing the FBI kit as costing $1999.00, not including the additional ABS manifold. Plus, you don't really know how comfortable the seat will be for you. The standard kit gets you lower, but also moves the seat pan back 2", so then you may have a handlebar issue, not to mention foot controls. The other kit that gets you even lower moves the seat position 2" forward, but narrows the seat considerably, so if you're a short person with a big butt, it may not be comfortable. From my calculations, you'd have close to $3000 in the FBI kit install, if not a bit more.
$400 seems a bit much for installing the Legends, unless that price includes installing the switch wiring internally on the handlebars. Otherwise, it's a 2 hour job. Even if they do charge $400 and you pay full retail for the shocks, that's $2000.
