First part. You won't go wrong with the V2 but I can almost guarantee that most here would recommend a V4 over it. It has a better tactile feel during the push. If polls are possible here, a favorite pen poll would be interesting. If you have more than 1 peptide, I recommend ordering a few pens and save yourself the shipping charges down the road. Most people order more.
I can't really answer the second part regarding the angle. But the needle gauge and length is a personal preference. Some say longer needles help with those "stingy" peptides. Some say it doesn't matter. I have some 29 gauge 12mm arriving today to test the theory myself.
