If you get into techstars they take 7-10% for $118k which is about a ~$1M valuation. If you're pre money, Seed investors usually cap their valuation at $4-6M, so depending on how much you need is how much they are going to get. That said VC's tend to have a much better run rate then angels. They tend to help you more with further rounds. Really good incubators (only a handful of them exist) can also help further your secondary raises, startups tend to raise on average $2m after graduating.

But the real question is why do you need funding? Are you ready for funding? What is the use of funds directed into?