There is a company I booked with this year Seabbatical
currently all there boats in in the BVI. They have monohulls and catamarans... they are cheaper than most companies I have come by but that is because they offer longer charters and the longer you go the cheaper it is. We just booked flight through St Thomas and St Martin. Stt was a bit cheaper than SXM but had to change flights a few time where SXM was one change from Toronto. Airfare was 800 return including taxes + the lait flight was $250 Stt was around 700 all in.