I've got a bunch of HP5 120 and usually develop it in Xtol. Lately I've been using Pyrocat HD, with great results. I'm out of Xtol and I don't really want to mix another 5 liters as I'm on the road right now. Pyrocat's great as it can be mixed on the spot and I can keep it in small bottles, however it's not as versatile and doesn't give me that extra push to 800 that Xtol does.
So basically my question is what concentrated dilute developer, which can be mixed on the spot and will work for various conditions works well for HP5. I've heard Rodinal's no good with HP5. I have some HC110- any other suggestions.