You'll have to post what size, bedrooms etc.
I have stayed in two recently, I would recommend either.
V Causeway Bay was $28k for a 1 bedroom of ~500 sqft. Beautiful interior, good service, well soundproofed despite the busy location, really close to MTR making it about a 15 minute commute to Central. There are V apartments all over in Wan Chai, Central and I think Happy Valley.
Treasureview Soho was $31k for a 2 bedroom of ~700 sqft. Very good interior, good service, small amount of noise but not too bad, unbeatable location right next to the escalator, 10-15 minute walk to Central.
There are much cheaper places though, these are probably the pricey end of things.
EDIT: I see from your second post you have two kids so I guess you want at least 2 bdrms. Treasureview Soho would still fit the bill, although not all their apartments are configured for 2 bdrms, you have to get lucky.