I ran the 4035-560 at 2200 on my 7HV, it was no slouch of a motor at all. Plenty of power and it handles smack just fine.
When I sold the 7HV and got my E7, I put in the 4525-520....wow. Both running the same headspeed, but the 4525 just has way more torque and handles some serious abuse.
Both are great motors, since you already have the ESC and motor I would stick with those. You can always upgrade later on if you want more power.