Following ready made EPP foam platform made by Borjet Aeromodels could be of interest for some of us. It's called Maja and seems to cost around EUR 200.--, EUR 600 RTF, and EUR 1000 RTF set including Tx and lipos.See demo video hereIf anybody has experienced that airframe, please let us know.
Blue Collar on the RCGroups Maja thread had this to say about what outrunner motor, prop, and battery to use on the Maja:
"I flew the Maja for the first time today and it was a smashing success, well just a little bit of smashing (very long glide path and on the first landing it went a little to long into a fence - only minor damage to the horizontal stab). This plane is a floater that can haul a lot of weight. I have 3 5000 mah 3S lipos onboard right now for CofG. I am using this motor: http://www.hobbylobby.com/atlas_outrunner_2921_10_rc_motor_31039_pr... with an 11x6 prop and CC 50 amp ICE controller. Plenty of climb and it will hold altitude with about 25% throttle. I forgot to hit the timer on my radio but I would estimate about 30 min flight time on one 5000mah 3S. I tried a 10x6 prop as well but the 11x6 worked much better. It was pretty calm-5mph wind so I can't comment on how it will handle the wind but I am hopeful that it will. It is an excellent slow and stable flyer. So for now I am certainly not regretting the $300 purchase.
Hope this helps.
Several chinese brand motors are really very good at performance and endurance too. you can find several motors at r2hobbies.com and himodel.com and several others sites are also there.
Personaly I take outrunner motors with weig, size and mounting as per my requiement and many times I rewind them to further customize the parameters. These are doing just geat.
Functional is sexy.
Here is the Maja thread on RCGroups: http://www.rcgroups.com/forums/showthread.php?t=1095996&page=5
One RCGroups member has actually ordered a Maja and it has been shipped to him just recently.