I used Logic for a long time but, as someone who uses a lot of very RAM heavy sampled instruments, I eventually got fed up with large projects incessantly crashing, spontaneously reloading all of my samples, and a number of other crippling bugs that I imagine have roots deep in the legacy code. After years of frustration and ridiculous workarounds, I jumped ship and found REAPER. It handles the vast majority of tasks as well as Logic, and there are number of things I find even better suited to my workflow, especially after a little tweaking. Best of all, it's stable.
As others have said, Logic does have some nice built-in plugins - more so than just about every other DAW. If you don't have a collection of 3rd-party software instruments and effects, Logic could be very appealing. For $200, you'd be hard-pressed to find as respectable an assortment of plugins elsewhere, and Logic itself isn't a terrible interface to work with. It's stubborn at times, but of the major DAWs, I've always found it to be the simplest - with deeper layers of complexity for those interested in exploring it.
Oh, and the 32-bit/64-bit architecture has no effect on sound quality. Instead, it primarily impacts how much memory the program can utilize at a given time. Within 32-bit programs, there's a hard limit of 4GB. 64-bit programs cap off at 16.8 million terabytes - far,
far more than any musician should have access to in today's world.
It is often confused with the bit-depth of digital audio, which can make a significant difference in sound quality - though, unless you're processing the ever-living hell out of it, anything above 24-bit might be a bit superfluous.
That said, Logic 9 has been 64-bit for some time.
There's a helpful community over at the Logic Pro Help forums. Some of the folks there know the software inside and out, and can help you with anything Logic-related that's on your mind.
http://www.logicprohelp.com/forum/
Keep in mind, though, that REAPER is just as capable a DAW and certainly not something to be dismissed. It's all just a matter of finding the program that agrees with your way of thinking.