No argument that w/d is good filter but for Reef, I think it is
absolete. Look into good quality
LR and/or second hand tank which can be modified to be used as
sump/refuge. SInce came with tank, you can use it for FO or F/W or resale to other hobbyist at reasonable price, IMO.
If W/D came with external Prefilter (overflow), keep that to use on sump/refuge unless tank is Reef Ready.
Look into lighting, types of corals intend to keep, powerheads, and most importantly Protein Skimmer.
I feel that you should do bit more research on reef tank before spending a penny more.
Wish you a luck!