I moved late last year to a new place deemed by Netvigator to be a 'premier' location and therefore they could only offer 'premier' plans (ie 1gb but at 'premier' rates ). Luckily HKBN are also in my new building and I got a 1GB connection for $98 per month as well as free myTVSuper (I chose this over a 3m water filter) which on their website was worth $168 per month.
If going down the hkbn route, I suggest you do what i did which was to go to one of those street salesmen outside sogo/wanchai computer mall towards the end of the month and they'll cut you a good deal. I went at 8.45pm and the guy was due to knock-off at 9pm. He was desperate to make my sale so that he would get a $3k bonus that month, so he gave me the offer mentioned above.
service-wise, HKBN is noticeably slower on friday-sunday evenings, but it's 1/4 of the HKT offer. HKT also wanted to charge me $798 to move my connection from my old place. HKBN offered free installation.
Smartone also wanted to charge an installation fee and the monthly charge was also around $298.
Edit: if you dont speak canto, might be worth bringing one with you.