Are you looking for a school in Kowloon side? Which district you prefer? In fact, most of the band 1 DSS are the top ones.... the competition must be keen....
I went to the open day cum briefing of NPL and UCC (KE) last year. Both are good DSS indeed but I'd prefer NPL due to (i) school teachers' comments; (ii) school location and (iii) religious factor (we're not Christians). So you can attend the briefing this year and make your own judgement.