I have an Osmose I'm "assembling" when I have time (it's going very slow though)...I obviously haven't flown it yet but do have an Oxalys 50 which I like very much...I think you would have a fine pattern trainer with the Osmose and the price is right on the one listed in the RCU Marketplace..
If you elect to go that route here are a couple of threads on that aircraft you may like to read through:
http://www.rcuniverse.com/forum/m_7873011/tm.htm
http://www.rcuniverse.com/forum/m_9329383/tm.htm
One comment I have:
On both my Oxalys and Osmose the covering is very loose when I got them...I spent allot of time with the iron tightening the covering and making sure the edges were down..I have a little flight time on the Oxalys and the covering is staying tight so far...One of the issues with these planes was the covering is "junk"...Time will tell but it seems to me taking the time to stick it down in the beginning may help that issue a little..
I love my Oxalys...It flies like a dream and is easy to transport...I'm looking forward to the Osmose!!
Good Luck..
Chuck