bigsport - its not very true that gassers are that much more heavier than glow engines. E.g. the MVVS 160 (26cc) gasser is only like 50 grams heavier than an OS160 glow, for a plane of 72" the 50g is nothing. Have a look at the MVVS is you want to go into gas and do not want to burn your pocket.

As for planes, try the Extreme Flight Yak 54 (68"), she is light, about 8.5 lbs only. Another plane might be a Lanier Laser 200, 72" at 9.5 lbs. I have seen the CMPro/GSP Extra 300 (72") fly and she does fly well, not too great but well. That plane comes in at about 12 lbs. For me I say you should go for the EF Yak ... weight is everything!