You can also get the 8.3, the floorstanding version of the 8.2, for $209. You'll gain a bit of extension, but maybe lose some control due to the larger enclosure.
I personally haven't dealt with STO, but the person I bought my speakers from got them from them. He didn't report having any trouble with them, he just ended up wanting a different finish so sold them.
I chose Wharfedale because they had always been a curiosity of mine. When I was shopping for speakers originally, the Diamond 9.1 was at the top of my list to listen to, but unfortunately they were having some distribution problems so they ended up being nearly impossible to find new with a warranty. Last year after everything was sorted out, the Diamond 9 and Evo2 standmounts became extremely popular across a few internet forums due to very low prices from STO. The Evo2-10, which at one time were $299, were extremely underpriced making them pretty much the best speaker in that price point as they're comparable $600-$800 speakers (which is their MSRP as well). The best thing about them is how detailed they are without being fatiguing at all, and smoothness across the board. Bass, while not having much impact unless you really work the room, is very tight.
If you can afford $359, I'd bet that the Evo2-8 would be better than the Diamond 8 or 9, tower or bookshelf. Bass extension will not be as good, they will not be as punchy, but you'll probably get better detail and an overall more balanced presentation out of the Evos. However, I don't think you'll go wrong with any of these speakers.