How much can you do yourself, and how long can you have the car down?
For $2200 you should be able to do a pretty good rebuild of your existing motor. Unless the block is not rebuildable, which in most cases would mean you wouldn't be running it now, or you've already bored it to it's max tolerances, which I assume you'd also already know?
Otherwise, why not rebuild what you've got? IF you take your time, do some hardcore shopping, etc, you can do some performance improvement at the same time, for the same money, and you get the joy of building it yourself!