I'm not Brandon, but I'll toss my two cents in anyway... The OF1400 integrates with the whole Festool system nicely and that's probably the single biggest reason to get one. Using it with the guide rails is nice, the ratcheting collet is cool, the dust collection works well for some operations (only so-so for some too), and the plunge is very smooth. Having said all of that, the only thing it really does differently is guide rail use. Other than that, its just another router, IMO. Its very well made and its solid, but its not really head and shoulders above the competition. Not IMO anyway.
Don't get me wrong, I like mine and I'm glad I have it. However, to say it was truly worth the extra cost, I don't really think it was. It may be the best one on the market, but there are some very good routers available for a lot less money. If you want to invest the time setting up another router for use with the guide rails, you'll be able to do the exact same operations with it. It's not like the saws in terms of how unique they are.
Thanks for the post. I was wondering about getting one or something else. I wanted to get the package discount of buying two tools at once - saw/mft and then vacuum/??? Ideally, they would have some kind of a package deal for a discount on 3 tools, but no such luck! I've been thinking about the Domino, but at a cost of about $1k for the unit and tenons, it's quite steep. (I already have a mortising machine and biscuit joiner!) Anything else I should consider?