My avg. holding period is about 12 hrs. 5 pips is probably too far apart, but 1-2 pips would be okay. You mentioned a link but I didn't see one. Also, you mentioned "hedge"; I'm not hedging, purely directional.
FWIW, here's my observations on bid-ask spreads for a few of the brokers:
I've been watching bid-ask spreads with Gain, FXCM, Barclays, and futures on 6-10 pairs over the past few weeks and at a variety of times and events. Barclays is the worst by far. FXCM and Gain seemed pretty close. Gain and FXCM were always inside the Barclays spread, with the edge to Gain. Also, during US trading hours, Gain and FXCM were about 1.0-1.5 pips wider than the futures but were tighter by about 0.25-1.0 pips during non-US trading hrs.
I haven't watched the IB spreads as closely. I'll try to look at this more closely over the next week or two. I recall them being about 0.25-0.50 pips inside of the Gain and FXCM spreads.
Do my observations appear consistent with what you've seen with these brokers?