Well, I would suggest...
A Bridge Too Far
It Never Snows In September
Arnhem 1944: The Airborne Battle, 17-26 September
... oh, looks like you've already got them listed. Carry on.
The 3 best ones, IMO. Bridge Too Far is great for the narrative and overall story.
Never Snows in September is great for the German perspective. However, do NOT get the version you have listed, get THIS one instead http://www.amazon.com/Never-Snows-September-German-Market-Garden/dp/0711030626/ref=sr_1_1?ie=UTF8&s=books&qid=1278202860&sr=1-1 (or the hardcover) It has a bunch of photos and maps that the other paperback doesn't have.
Middlebrook's Arnhem 1944 is great for focusing on the British specifically at the Arnhem sector. Good detail. The paperback is out of print, but it's been reprinted in hardcover recently http://www.amazon.com/ARNHEM-1944-Airborne-Martin-Middlebrook/dp/1848840756/ref=sr_1_1?ie=UTF8&s=books&qid=1278202917&sr=1-1
On top of that, I'd also recommend Operation Market-Garden: Then and Now, in 2 volumes
Not only does it have tons of good comparison photos, but the text also goes in fairly good detail on the operation in general, including the 101st and 82nd sectors (in more detail than the other books mentioned above have). It seems pretty comprehensive. I've only read up to the 1st volume right now, though.
I have all these and highly recommend them all. Then and Now is just awesome whether they do Market Garden, Bulge, D-Day, etc...