Should i take l-arginine or nitric oxide i want a very good brand which one is better or with brand?

im a beginner in body building, i weigh 185 and my goal is to reach 200 ''very muscular'' im buyin protien shakes and creatine but i don't know if i should buy l-arginine or nitric oxide because i heard they both the same but is expensive which is best and what brand ?