Good detector from an established company. They manufacture the SEF and Ultimate coils, EDS/Winner detectors etc and have been producing hoard hunters for years and years. I would avoid the original SSP-2000 purely on the grounds that its ancient and that the 2100 and 3100 were improved. The 5100 has even more depth and sensitivity and they now produce nine or ten coils both standard and "discriminating".
Question is have you got a site to make the best use of it ?