After all that I've read about HitBTC, it's not on my list of trusted exchanges. I've used it, it worked fine, but I don't trust them with deposits.

There's a small one that I really like:

BL3P. It's only used for EUR-BTC trading, aiming at EU-users, and is currently invite only. They responded very fast when I contacted support, and that's the reason they don't want to grow faster than they can handle.
I switched to this one instead of Kraken because of Kraken's terrible performance (whenever there was action on the market, Kraken went down), and it has much higher withdrawal limits.

Where's Poloniex in your list? I've recently opened an account for my altcoin experiment, they've had their problems in the past, but as far as I know they have quite a lot of users.

Are there even exchanges that ask for less than 0.5 mBTC nowadays? That's about 100 times more than needed, and at least 10 times more than needed to have a fast transaction most of the time.