How old are you bro? I mean like I said you'll be happy with the results at 400 and I would definitely recommend that you stay there if you're seeing the results you want but there's a published study I'm going off of where 100 men 18 to lets say 35 were each given doses of either 25, 50, 100, 300, or 600. Now I'm going from memory about all the little details, basically most groups saw some results but they figured out 600 was like the "perfect" dose as far as results/minimal sides and that 300 pretty much had the same sides but the mass and strength gains for the 600 group almost doubled that of the 300. Just some food for thought, if you looked up best test dose I'm sure you could easily find the article I'm speaking of. I'm looking forward to seeing an after pic, even though I can only view it at a 1 inch x 1 inch size haha. I'm currently on 300 Test E every 4th day I decided on which is just under 600 week we'll say and so far going into week 5 I'm up about 8lbs. and strength is noticeably increased. I didn't catch how long you said you were planning on running it for? Also, what kind of results are you looking to achieve?