The G34 is a great starter pistol, inexpensive but shootable, mags were cheap, but still are compared to STI, Para wide bodies. Easy to accessorize without a gunsmith. Get a good set of sights ( warren/sevigny's I like ), good holster, 5 mags and go play.
I think you should always get your feet wet and make sure you like it, ( the game or the training ) before investing big dollars.
Glocks don't depreciate much either, Nor do STI's
