I'm 6 foot 2 and two-hundred-and-mumble pounds (ok, almost 260 fully loaded), with long legs. I'm quite comfortable on my 2010 Classic C5, which I ride daily, and have ridden almost 2000 miles at this point, including 100-mile highway trips. I was originally considering a Suzuki S40, but the riding position was so contorted for someone my size that I looked around for something else. And I really like the fact that I can ride completely upright when I want to.
I took MSF training on a Suzuki TU250. I thought it was a comfortable bike, until I got onto an Enfield and realized how squeezed I'd been on the Suzuki.
I've installed both factory and aftermarket accessories and so far have no complaints about the quality of anything. There are a couple of large specialized parts and accessories dealers (NField Gear in the US and Hitchcocks in the UK) that carry very wide ranges of items and are knowledgeable about what fits. When I bent my footpeg in an unfortunate incident (cough), Hitchcocks had a factory replacement part in stock that matched the original paint color. I've also bought "generic" accessories and gear from Helmet City, Kuryakyn, Aerostitch, Jafrum, Motorcycle Superstore, etc., etc. which work fine on the bike.
My bike has a few minor inconsistencies in workmanship (mostly cosmetic and hard to notice, like the rear mudguard is mounted to the frame slightly unevenly), but an Enfield is meant to be a bike with personality and I don't mind them.
This weekend I'm renting a Triumph Bonneville T100 on a trip, and I'll be able to compare the rides of the two bikes when I get home.
The price you quoted seems very fair, especially if it's the dealer that you'll be coming back to to service the bike and you can expect they'll stand behind it. I paid (in 2012) $7000 out the door for a new 2010 Bullet C5 (which works out to $6429 plus $571 sales tax, prepped and reg fees paid and with a full tank of gas). And they spent an hour prepping and testing it, I watched them do it. I could have saved maybe $300 by driving an hour into the sticks (and would have had more bikes to choose from), but I decided to buy from the dealer here in NYC that I knew I'd be depending on if anything broke.