I don't quite understand the approach. I would rather bet on a 1% HE site if I like the software better, or how they treat me as a customer (the promotions they offer, if they process withdrawals faster and things like that) than on a 0.5% site.
@OP 1% house edge is probably about the best you are going to find and really all you need IMO.
I don't think he will notice much difference in the sessions between 1% and 0.5%. In the long term he will have that 0.5% more loss but in the short term I doubt very much that the difference will be appreciable. If it was between 10% and 1% it would be noticeable.