How much power do Marin Logan Vantages need?

Read Avreview.com's gushing about new Summit's and they said "You'll need power" since it can gop as low as .07 interms of load.But web site say's rather obliquely that new ESL series work well with 100-200 watts.But then you see the review quote that ML makes elsewhere on thier site that speaker can use 100-250.Reviewer thought 300 Krell watts did them up nicely so just wondering if anybody has bought or spoken to staff and inquired about power.I ask because a freind of mine said thee sp[eakers were very impressive and with a 100 watt Krell integrated (is thier one that low right now in Krell line up?Think 300il is maybe 150 and 400 int of recent vintage was 200) but in any case my freind thinks he was listening to a 100 SS watts and it was turned up and was so loud it hurt and he had to tell the guyto turn it down.And my freind does like to really rock out at times.So verus the Summits is the Vantage that different i.e. more effcient?I would assume it would have about same characteristics load wise and need 80 minimum better 120 watt of tube power or 200-300 and of course it should be quality high current watts.So can anybody fix a miinmum and a ood margin for he vantage for m,e an i's difference if much from Summit.
Thanks
Chazz