Question(s) relating to monitor loudspeakers

Hello all you speaker building fanatics,

I have a few questions:

1. I would like to build a pair of monitor speakers to use with my DAW. I have a pair of Dynaudio D28/2 tweeters I would like to use and was wondering if anyone could recommend a good woofer to go along with the aforementioned tweeters? The kind of music I make is bass heavy so a 6.5" woofer may not cut it (8"?). I also plan to purchase an LCD so shielding isn't needed.

2. It would be nice if they were powered... Apexjr used to have Alesis plate amps for sale but not anymore, anyone know where one could find something like that now?

Any help would be... well helpful.