Grados won't provide you any isolation and will leak quite a bit into your surrounding environment (don't know if that is a problem for your co-workers). I'd suggest starting with the SR225s and maybe that hifi man hybrid tube/headamp. You'd probably clock in around $300 and have a very reasonable work system.
Your wants are a little confused to me as it seems you want isolation, but want to be able to hear important things--if isolation is your thing and your taste errs towards the analytical side, give Etymotic a listen. If you went for the er4ps you'd clock in below you budget and probably not need an amp. They'd provide great detail and tight bass--staging is on the flatter side and the signature can be on the drier side.
Triple.fi 10s are also a reasonable option. I ultimately gave my pair away to a friend as I wasn't using them (I'm a speaker guy) but they're nice though perhaps missing a little top end sparkle.
Audio Technica makes some great open headphone starting with the A or is it AD700--I owned the 900s and they were nice. They will leak and not give much isolation, but have a very musically satisfying signature.
I've owned a ton of headphones over the years and could go on with suggestions, but my strongest one will be to skip the beats. Seriously... You can do much better. No, I haven't heard the beats. Yes, I'm prejudiced against them despite.
Your wants are a little confused to me as it seems you want isolation, but want to be able to hear important things--if isolation is your thing and your taste errs towards the analytical side, give Etymotic a listen. If you went for the er4ps you'd clock in below you budget and probably not need an amp. They'd provide great detail and tight bass--staging is on the flatter side and the signature can be on the drier side.
Triple.fi 10s are also a reasonable option. I ultimately gave my pair away to a friend as I wasn't using them (I'm a speaker guy) but they're nice though perhaps missing a little top end sparkle.
Audio Technica makes some great open headphone starting with the A or is it AD700--I owned the 900s and they were nice. They will leak and not give much isolation, but have a very musically satisfying signature.
I've owned a ton of headphones over the years and could go on with suggestions, but my strongest one will be to skip the beats. Seriously... You can do much better. No, I haven't heard the beats. Yes, I'm prejudiced against them despite.