No iAccessory will be the perfect accessory for all people and all devices.
Also, sound "quality" is _highly_ subjective, and personal. The first iPod docking system I auditioned was top-rated on the Apple Store's website. The system sounded horrible. To me.
If you want the best sound from your 9/12/12 iThingie then we probably all have to wait a while for the dust to clear and for manufacturers to catch up with Apple. Big hint: the _best_ sound isn't going to be via Bluetooth, but Bluetooth is going to be the most convenient. Pick your compromise.
If you want the best sound from one of the 400 million pre-9/12/12 iOS devices or 350 million pre-9/12/12 iPods then get a line-out dock adapter (Amazon) and plug it into an input on your real stereo. Or if your A/V receiver is compatible, plug your iThingie into the USB input (using the dock cable that came with your iThingie). Or buy your receiver manufacturer's proprietary dock.
Second-best is a 1/8" mini stereo headphone-to-RCA cable to an input (Amazon).
Same goes for filling a large hall or the great outdoors with cranked tunes; use one of the above methods to connect to a stereo or PA. (Some PAs have docks. None will work with the 9/12/12 devices.) The iGroove is less than 12" long x 5" high x 4" deep. It can hide behind my 13" MacBook. The iGroove is impressive, but consider the physics.
If you want a small, tactful docking speaker system for your pre-9/12/12 iThingie that puts out a reasonable level of really clean, well-balanced sound that's not all treble & mud with no midrange (or any of the other nasty sound-quality compromises common to this form factor), then this could be your unit.
If you want background music for your BBQ, then this could work fine.
If your iPad or case won't fit the dock, get a dock-extender cable (again, Amazon), or choose a different unit.
If having The Latest Thing regardless of sound quality is your priority, then this isn't for you.
If you go listen to dock-speaker systems with your own iThingie and uncompressed audio files covering a variety of music, I expect that you won't find anything that sounds better for under $300. And lots of things that sound worse for more than that amount... But you should use your own ears and your own music, not the manufacturer's "Demo" button or what some guy says on the interweb!
I'll have my Classic for years, and even the current Classics have the old dock connector.
Every product is a set of compromises.