Phase 4 Study of Greenlight XPS Laser Versus BiVAP Saline Vaporization of the Prostate in Men With Symptomatic Benign Prostatic Hyperplasia

Inclusion Criteria: * male over the age of 18 years * present with symptomatic/ obstructive symptoms secondary to PBH requiring surgical intervention * subjects must read, understand and sign the Informed Consent * AUA ≥ 15 * Qmax \< 15mL/sec * Stopped BPH medication. Alpha blockers 15 days 5-α-reductase 3 months * Prostate volume ≥ 30g Exclusion Criteria: * PVR \> 300ml * Current urine retention * Previous surgical or invasive treatments (TURP, TUMT, TUNA) * PSA ≥ 4 (must have negative biopsy within last 12 months) * Neurogenic bladder * Obstruction due to urethral stricture * Any disorder or condition of the subject that the investigator believes will counter indicate their inclusion in the study