i have only used my Edelrid Perfect, but it seems to handle really well and even after plenty of outdoor use does not have visible wear. No dry treatment, but I figured that when it's wet I won't be climbing (I don't do winter/ice climbing).
In reply to James Malloch: Ones with dry treatment seem to last better than non-dry treated ones, even if they never get wet - something to do with the fibres rubbing against each other's dry treatment coating rather than fibres rubbing directly on fibres or something like that.
I've got an Edelrid Eagle - 9.8mm, looks to be similar to the Heron but it laos has the Pro Shield treatment - something to do with reducing friction and thus wear between fibres I think. Used it a fair bit but not loads, and it's great so far. Nice and supple to handle, no signs of wear, feels nice and 'round' instead of flattening out over krabs etc like some do under load, and it's light enough to redpoint on but beefy enough to work routes with too.
I think you have the Boa already, as your indoor rope - or maybe it's the Python, I forget. The Boa and Perfect look like the budget ropes, Viper maybe a bit thin for working routes (and not much of a weight saving compared to the 9.8 ropes).
If you're thinking of other ropes too, the Sterling Velocity is brilliant but it does cost more then the Edelrids I think. The Depot might have one on sale if you call them up, they had some at 30% off RRP...
I'm using an Edelrid Cobra (I think 10.3mm) and it's lasting really well. No noticable furring or anything and it's been treated fairly roughly for over a year now. It does seem to kink a lot though, could be due to grigri.