What's 'acceptable' to one person, audio quality-wise, may not be good enough for the next. I've never been a fan of adapters though.

Personally, Bose are overpriced IMO and E for what they actually deliver, sound quality-wise. The same $249 should go towards a low end HTIB system, with actuall 5.1 surrounds/sub, that will provide proper sound field for you to enjoy. Examples:

http://www.amazon.com/Onkyo-HT-S3500-5-1-Channel-Theater-Receiver/dp/B0077V88V8/ref=sr_1_2?s=electronics&ie=UTF8&qid=1340214390&sr=1-2&keywords=HTIB

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http://www.amazon.com/Denon-DHT-391XP-Channel-Theater-System/dp/B003QP3M92/ref=sr_1_10?s=electronics&ie=UTF8&qid=1340214390&sr=1-10&keywords=HTIB




</div>Onkyo USA also offers quite a few of their HTIB systems as refurbished models for a discount. Link:
https://www.shoponkyo.com/products.cfm?group_id=1&subcat=Systems